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is a significant concern for physicians. Central
! }+ B0 c ]/ A z9 ^7 r5 Uprecocious puberty (CPP), which is mediated3 ?. R7 i, w& Q
through the hypothalamic pituitary gonadal axis, has
; ]% R# ^1 D, |% b6 p4 na higher incidence of organic central nervous system1 o5 r7 }" T$ j
lesions in boys.1,2 Virilization in boys, as manifested. ?; G1 o7 m! x6 ~' @
by enlargement of the penis, development of pubic
" o# v. R) O$ b2 `$ Phair, and facial acne without enlargement of testi-
, s8 I0 f7 P2 g7 Fcles, suggests peripheral or pseudopuberty.1-3 We( {4 I3 k3 q& |
report a 16-month-old boy who presented with the
$ Y3 [$ ^( S. \) Z: s/ W$ J8 S9 oenlargement of the phallus and pubic hair develop-
7 E9 W7 R/ L0 j* _" h l4 Hment without testicular enlargement, which was due) T+ i7 n$ b5 X0 i; i' Z1 q
to the unintentional exposure to androgen gel used by v* y, ?/ o8 o9 P
the father. The family initially concealed this infor-
: ?+ P/ k7 R& G& k3 a4 ^7 J, `mation, resulting in an extensive work-up for this9 w% p! ]; E( l. c
child. Given the widespread and easy availability of( |4 S: _9 s5 B' L1 ~* A
testosterone gel and cream, we believe this is proba-- v: I3 S# o( b" }& n
bly more common than the rare case report in the* ?$ j8 g0 g# _
literature.4
k1 p2 @+ U3 g( LPatient Report: |1 ^- ?: K* l
A 16-month-old white child was referred to the+ [9 h2 x- c% r9 D0 y
endocrine clinic by his pediatrician with the concern9 x5 L9 i- i7 {2 |
of early sexual development. His mother noticed O# ^6 x$ P* f0 Z( H3 o( i
light colored pubic hair development when he was
8 e- T& g7 F! q, o* X6 P$ v5 UFrom the 1Division of Pediatric Endocrinology, 2University of
( G! ` h8 F# s8 x3 Z: TSouth Alabama Medical Center, Mobile, Alabama.7 f5 Y5 G3 W# Y, n; P% \8 I
Address correspondence to: Samar K. Bhowmick, MD, FACE,# t4 n/ Z# P" _ t7 |# _6 v7 f
Professor of Pediatrics, University of South Alabama, College of
. e. v. a; W2 G% [6 OMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
0 w9 J7 X9 W: T8 q+ j6 Ae-mail: [email protected].6 x1 T& g' W& s
about 6 to 7 months old, which progressively became1 n' f$ g. i$ g, q+ i( c8 t
darker. She was also concerned about the enlarge-9 U/ k+ J; `5 V; y8 s
ment of his penis and frequent erections. The child
- z% c8 S6 [3 |/ {! Swas the product of a full-term normal delivery, with
; y, d" G9 a1 J% W! r+ ka birth weight of 7 lb 14 oz, and birth length of% c, d6 @! ]4 l3 a- e$ L4 L
20 inches. He was breast-fed throughout the first year; [ B5 M! A5 d& [8 j9 K
of life and was still receiving breast milk along with; f+ y- @; D! L$ X! z8 s
solid food. He had no hospitalizations or surgery,* r5 x% L6 L) f7 L5 L9 }$ Q' c& F
and his psychosocial and psychomotor development1 D& e, W6 a/ W6 |! v
was age appropriate.7 o+ x; a- }1 G
The family history was remarkable for the father,
5 x) I5 X4 c# `, s: m* lwho was diagnosed with hypothyroidism at age 16,
: \+ B6 t& Z/ R) f2 v! `& [which was treated with thyroxine. The father’s
* u6 F; s( N# p$ @/ }7 J$ Zheight was 6 feet, and he went through a somewhat1 ^ \$ q0 P- m0 M: W! E3 T$ Q
early puberty and had stopped growing by age 14.& u! Y1 N) l+ u- f
The father denied taking any other medication. The U c% \( B8 X
child’s mother was in good health. Her menarche3 K: [) {! k% V9 x
was at 11 years of age, and her height was at 5 feet
- A, t! G2 z) z7 s) p5 inches. There was no other family history of pre-' r8 C% a+ ?, {
cocious sexual development in the first-degree rela-8 q4 j) R: z- Z! [. s1 }- B
tives. There were no siblings.
I3 ~6 z4 F& s8 j! s- n8 a: ]1 kPhysical Examination" |' w; x* K( U; }3 q f
The physical examination revealed a very active,
+ p3 z' S" i5 |0 Cplayful, and healthy boy. The vital signs documented
. Q6 }2 E6 F6 V# |& C. ga blood pressure of 85/50 mm Hg, his length was) ~( Z, S) z, O. ~6 d0 a
90 cm (>97th percentile), and his weight was 14.4 kg& M% u+ z4 U7 N. w$ [1 ?
(also >97th percentile). The observed yearly growth+ R% ]/ k# g. N5 O# Y! k: t
velocity was 30 cm (12 inches). The examination of
3 P' _# b$ p8 ^0 ^0 S+ ~# u% Z! b# othe neck revealed no thyroid enlargement.
( A) w* i \8 r$ V5 Q9 X qThe genitourinary examination was remarkable for& i5 Q% S; Q0 m1 k
enlargement of the penis, with a stretched length of. t* l5 Y8 z0 o6 ]- [0 D
8 cm and a width of 2 cm. The glans penis was very well& V. g7 E0 E' d% K, E
developed. The pubic hair was Tanner II, mostly around* G1 |1 M1 O# |, y7 Z
540
6 a8 {1 p/ Z, W+ }; c+ e6 nat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from W; }. r7 ]" M; ?. R. b5 Q. \& |
the base of the phallus and was dark and curled. The3 j( L/ K6 a$ s: i! \- U; w
testicular volume was prepubertal at 2 mL each.7 A% \+ L! c" z
The skin was moist and smooth and somewhat
4 Q5 W2 H4 n! R1 i: L2 D0 ?oily. No axillary hair was noted. There were no
, ^; N( c3 G; P( z4 |# b: [9 ^abnormal skin pigmentations or café-au-lait spots." R7 W8 G \# R3 V+ j( ~" |. ?+ \5 r
Neurologic evaluation showed deep tendon reflex 2+
7 J# A3 E* }& q! B; Wbilateral and symmetrical. There was no suggestion6 C2 b* ]# s8 Y4 E
of papilledema.* \2 {; V2 u- h
Laboratory Evaluation* P: h4 s& y: B* f2 b
The bone age was consistent with 28 months by
! p* o. F3 ~: x; A$ Cusing the standard of Greulich and Pyle at a chrono-
5 x0 {" t2 V/ H. A# Rlogic age of 16 months (advanced).5 Chromosomal! H' i5 z, k" h
karyotype was 46XY. The thyroid function test
9 E7 c( S4 F' a' L3 Wshowed a free T4 of 1.69 ng/dL, and thyroid stimu-) A/ u5 b" k# |
lating hormone level was 1.3 µIU/mL (both normal)./ S% }3 v& f, n4 k- x' x8 R) Q
The concentrations of serum electrolytes, blood
2 Q- k; J) [, j. h# V7 p/ Yurea nitrogen, creatinine, and calcium all were" {' n7 y! V8 i" |
within normal range for his age. The concentration
9 o, h& R& a8 _# d- K# ^of serum 17-hydroxyprogesterone was 16 ng/dL+ _8 M0 f' v {, f: V
(normal, 3 to 90 ng/dL), androstenedione was 20
! n% `; S; ^5 Fng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
# ` x5 g5 l& `& a' B" Q) tterone was 38 ng/dL (normal, 50 to 760 ng/dL),
C0 x, p! \2 Q5 z6 ~3 i/ p5 V8 z3 B1 ]desoxycorticosterone was 4.3 ng/dL (normal, 7 to" |! J3 n$ R- |, d
49ng/dL), 11-desoxycortisol (specific compound S)' m; M. @: x$ d$ C
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
) c( R* ^5 Y; I5 ]/ E" G6 Atisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
! D+ p: X2 ~& G' o( ^testosterone was 60 ng/dL (normal <3 to 10 ng/dL),7 v; F" O% E6 g3 F0 |' K C
and β-human chorionic gonadotropin was less than6 T2 d+ V$ @% ~( G' S! a
5 mIU/mL (normal <5 mIU/mL). Serum follicular
4 D6 i* }3 M1 X# Gstimulating hormone and leuteinizing hormone
/ | f% H) y! Q: ?+ r1 \concentrations were less than 0.05 mIU/mL
3 a- F& a% ^+ G& u9 z7 M! a(prepubertal).# ?4 ~4 q* w3 C& d
The parents were notified about the laboratory
% R6 ^% h' b2 a) @ `results and were informed that all of the tests were% o' m- K# P6 h' d9 V- t- I
normal except the testosterone level was high. The2 ^% i# ]- K" `8 ^+ s8 j
follow-up visit was arranged within a few weeks to
; y. f- H; Y- a% A6 S2 mobtain testicular and abdominal sonograms; how-
) y( K# m- z2 Q$ h$ f1 Z [# ^ever, the family did not return for 4 months.
5 \8 R" [- @, o+ @+ n: x0 I" U0 i+ {Physical examination at this time revealed that the" I0 b! U y7 c
child had grown 2.5 cm in 4 months and had gained
' X: w# [1 k1 {1 ^8 N2 kg of weight. Physical examination remained
: j1 G1 j; C1 n2 h) R9 P+ o/ V/ qunchanged. Surprisingly, the pubic hair almost com-
0 A ~$ D5 }' ]4 A; p. {: {pletely disappeared except for a few vellous hairs at: v4 \! A+ n n5 }. k
the base of the phallus. Testicular volume was still 2
8 K* V; p* f. y) s* ^mL, and the size of the penis remained unchanged.+ i' _- T5 o8 h, H& `2 P) r/ t
The mother also said that the boy was no longer hav-+ p8 X, K& g) w: l3 X
ing frequent erections." @( y; p7 A* X$ k
Both parents were again questioned about use of
; _$ n) ~0 x* h a" v( e5 B. ~, Iany ointment/creams that they may have applied to& q& e& w# `: _+ e' z( c' |7 ^
the child’s skin. This time the father admitted the
9 e+ N; p! M4 _Topical Testosterone Exposure / Bhowmick et al 541
4 |8 }7 \. V' Euse of testosterone gel twice daily that he was apply-
& ^8 e: ~. B! @% F( y b0 ]0 ning over his own shoulders, chest, and back area for' u; u+ j4 K4 @3 K) e- w
a year. The father also revealed he was embarrassed
+ ~: w" g9 n. y; H, @! _to disclose that he was using a testosterone gel pre-5 \, n: I( s2 p8 Q0 o
scribed by his family physician for decreased libido- Z6 b2 I( o+ N2 J$ y, V
secondary to depression.( ]& p: \4 x, T
The child slept in the same bed with parents.8 Y1 D$ b; o4 {' ~7 W
The father would hug the baby and hold him on his
8 }; ?6 v# |- [& a- Tchest for a considerable period of time, causing sig-
0 @" v3 w; m) F# |. anificant bare skin contact between baby and father.# d* ~1 Y8 |' O2 q! I7 `
The father also admitted that after the phone call,
, }& {# |% T$ L7 k# Z( h) E: I1 Zwhen he learned the testosterone level in the baby; j0 |, y# E! W( ^
was high, he then read the product information( O; ?! J! B3 r4 a
packet and concluded that it was most likely the rea-
4 u! t: _# E$ ]+ R* Nson for the child’s virilization. At that time, they+ x! k7 W7 c: S/ U+ F( k
decided to put the baby in a separate bed, and the
9 c# V7 L0 O& U* l9 o2 Jfather was not hugging him with bare skin and had/ h0 o+ @3 @8 t- Q; i7 I/ X
been using protective clothing. A repeat testosterone, d7 ?' M0 _ Z4 ]! g) c
test was ordered, but the family did not go to the( `$ [4 C0 D$ k# P* X* h8 K/ W' t
laboratory to obtain the test.# @; o5 |+ K2 g6 a
Discussion/ g9 `; S* |- s n' G/ h9 L) Q4 B
Precocious puberty in boys is defined as secondary
: l0 N4 E; g* x* }sexual development before 9 years of age.1,4
9 e, ~4 w$ e. ]. UPrecocious puberty is termed as central (true) when" y( f: q8 A( |4 N7 v
it is caused by the premature activation of hypo-
3 t0 `$ ^. ~2 A- y' N, \thalamic pituitary gonadal axis. CPP is more com-
0 ?- u6 D5 ?8 p) [9 A: mmon in girls than in boys.1,3 Most boys with CPP4 v( {6 W; @1 E* [, V/ N
may have a central nervous system lesion that is
4 j! S& Z4 v. e- L5 D7 Kresponsible for the early activation of the hypothal- A: L" F* C+ M7 t
amic pituitary gonadal axis.1-3 Thus, greater empha-9 R8 l9 T K0 X1 G- Z+ M2 _
sis has been given to neuroradiologic imaging in: x9 Z* h3 u+ |" C( T& t; u
boys with precocious puberty. In addition to viril-/ ~, `- s2 }* j( c
ization, the clinical hallmark of CPP is the symmet-1 s! A" J& w9 X, w8 F
rical testicular growth secondary to stimulation by
3 G, a) i9 |0 @5 g2 y$ Fgonadotropins.1,3
0 e/ x1 A" M5 P9 \+ i9 p6 z$ o% u) wGonadotropin-independent peripheral preco-
/ L! d+ g6 i. Q1 o6 B7 Icious puberty in boys also results from inappropriate' K" l: A4 g( k% d& N7 v) S: ^( X
androgenic stimulation from either endogenous or' W9 T. B% o% |4 {( {
exogenous sources, nonpituitary gonadotropin stim-1 a9 d4 I$ C$ z9 F) L( c1 p. i
ulation, and rare activating mutations.3 Virilizing
( K. w* V# c1 B7 R. S3 Lcongenital adrenal hyperplasia producing excessive4 M" I, |: J7 ?8 {, }: v! ^
adrenal androgens is a common cause of precocious
+ L$ Y0 t: N( ~, C: E: M! }, `" M/ Lpuberty in boys.3,4 }2 G9 r+ W: t* h
The most common form of congenital adrenal
" O9 H( V9 \2 ~3 H& bhyperplasia is the 21-hydroxylase enzyme deficiency.
* p0 l+ m4 c& O' u2 NThe 11-β hydroxylase deficiency may also result in: v5 x0 ? Q" `, _ ^ K; ^$ L
excessive adrenal androgen production, and rarely,/ l# R) d7 E$ v: P0 b
an adrenal tumor may also cause adrenal androgen
6 d- E8 j( I* Y$ Oexcess.1,3
$ g& c( ~( d) l- ~' eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, v" q8 R* }" h8 g& A1 O
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
$ p; V+ Q, e: J, f; r6 u lA unique entity of male-limited gonadotropin-
1 `3 u* {" O, j+ M1 mindependent precocious puberty, which is also known
. v; D+ \5 r1 @. [- ~) Yas testotoxicosis, may cause precocious puberty at a" J( [$ E) n) D3 t1 d, ]
very young age. The physical findings in these boys9 A8 u# x8 o: s4 t% ~8 U1 j
with this disorder are full pubertal development,) g# M/ q! C" b- q' {4 X7 `
including bilateral testicular growth, similar to boys
' [; |7 A! m" ]5 Ywith CPP. The gonadotropin levels in this disorder
5 P- e: Z, k/ R* V# iare suppressed to prepubertal levels and do not show. i B, p: Y- ?( i
pubertal response of gonadotropin after gonadotropin-3 ] Y% S. {- ?% ]& |
releasing hormone stimulation. This is a sex-linked% [3 }& I3 \2 k
autosomal dominant disorder that affects only
9 @. ~3 s, T; ~" Rmales; therefore, other male members of the family
e9 G3 k. a8 d( d+ x. @+ A6 smay have similar precocious puberty.3, S1 W3 A$ K. f3 t3 E
In our patient, physical examination was incon-4 X& d# n9 S p' C( a$ W5 ?
sistent with true precocious puberty since his testi-
5 d! {) \ D( i8 n7 {cles were prepubertal in size. However, testotoxicosis
& _, l9 v6 X! mwas in the differential diagnosis because his father
( ~8 y) h: T" A l8 t8 lstarted puberty somewhat early, and occasionally,$ e2 I7 H6 m5 d
testicular enlargement is not that evident in the6 I) k( \! X1 c& f5 z: k) M5 ~
beginning of this process.1 In the absence of a neg-: e! n) N3 o& `) T8 {; \, W2 [- F
ative initial history of androgen exposure, our
2 {$ \2 t U7 D0 W( F6 Tbiggest concern was virilizing adrenal hyperplasia,
5 y; }7 w' Q# Meither 21-hydroxylase deficiency or 11-β hydroxylase
# i" [) ~6 Z% f& T- h0 o7 N, Pdeficiency. Those diagnoses were excluded by find-
4 r. @) ~; j3 X/ r. n' hing the normal level of adrenal steroids.
, q) z# o& y! X* ~ z/ XThe diagnosis of exogenous androgens was strongly
$ N/ v) y' f8 N, m0 _7 K1 |' q: K7 msuspected in a follow-up visit after 4 months because; x. R N \9 |" q' h# d
the physical examination revealed the complete disap-
, X; T4 T1 `& Tpearance of pubic hair, normal growth velocity, and I* u0 I& m) X) t7 k+ t
decreased erections. The father admitted using a testos-7 q& J) k* q( t
terone gel, which he concealed at first visit. He was6 H! y- J1 `: e& w2 v
using it rather frequently, twice a day. The Physicians’$ Q% l6 a l, N! W' Q% E) p% N
Desk Reference, or package insert of this product, gel or
1 e8 g! r M o) z7 tcream, cautions about dermal testosterone transfer to3 B) Z3 w- u6 ]- Q5 |' e
unprotected females through direct skin exposure.6 s1 R5 j1 d4 d7 U* m
Serum testosterone level was found to be 2 times the
; c: S4 }3 w7 N' ^+ k+ [* ybaseline value in those females who were exposed to6 ^8 A* ~# F* F& Q
even 15 minutes of direct skin contact with their male
3 Z! v# z/ D+ u- w7 q# @' O1 I2 cpartners.6 However, when a shirt covered the applica-
6 L0 x9 w; t. r2 v w: w% f# V- I6 `tion site, this testosterone transfer was prevented.
& d1 @2 ?8 h5 e8 W" h' P$ tOur patient’s testosterone level was 60 ng/mL," V3 E, S* p! r& c" p& @9 l1 D
which was clearly high. Some studies suggest that. v y! V, o1 S% e4 w, J& {
dermal conversion of testosterone to dihydrotestos-: P. U& x& e9 x$ S% J l8 e
terone, which is a more potent metabolite, is more0 V2 k2 m* [) v$ m2 L) ?- v, s
active in young children exposed to testosterone
* _, }- f# l5 ]: V2 e0 I2 lexogenously7; however, we did not measure a dihy-' K0 `0 E% d5 g/ j5 Z1 z+ ^; x P6 g7 ^
drotestosterone level in our patient. In addition to
/ n! E( U" ~8 N/ o8 e: I/ Fvirilization, exposure to exogenous testosterone in
9 E, O/ R9 F" z1 u! Cchildren results in an increase in growth velocity and8 n- V! b; n: ^1 ~7 T7 N1 F
advanced bone age, as seen in our patient.
" }- c' C4 F/ t- sThe long-term effect of androgen exposure during
3 _, @, D' J. H, dearly childhood on pubertal development and final2 n1 L5 q/ g* i3 Z8 J
adult height are not fully known and always remain
% z. M4 X) |8 W8 A# I7 X9 K _a concern. Children treated with short-term testos-
) _7 m. F! Y5 T; T" q: n. v% F5 `terone injection or topical androgen may exhibit some/ C+ N$ @5 f Z9 t: C3 c$ n
acceleration of the skeletal maturation; however, after
3 o5 ], z5 h& Z+ p3 \cessation of treatment, the rate of bone maturation$ Q) n# j. U6 J
decelerates and gradually returns to normal.8,9
( O7 v: T* s/ f$ I: }6 R. L: _There are conflicting reports and controversy
* A0 ]# o/ Y9 L- O% Wover the effect of early androgen exposure on adult* ^8 g7 B( q9 M4 P; L5 J5 h% B
penile length.10,11 Some reports suggest subnormal: v6 n1 p7 n, a8 I1 i
adult penile length, apparently because of downreg-4 W; \9 `! r0 u
ulation of androgen receptor number.10,12 However,
2 u0 [7 U% }0 ]3 x+ a1 `Sutherland et al13 did not find a correlation between, w/ [; T" y8 [% I+ ]* p
childhood testosterone exposure and reduced adult
: g& i/ K0 x3 s8 a- F/ E- Vpenile length in clinical studies.& y$ L! ?; @" g1 b% @
Nonetheless, we do not believe our patient is( \2 t5 e: j1 q, p6 n
going to experience any of the untoward effects from4 i$ A5 e/ |) j
testosterone exposure as mentioned earlier because
# X, V, Z% F5 y) c! wthe exposure was not for a prolonged period of time.
: C4 p) D3 v2 r- Q: U, fAlthough the bone age was advanced at the time of
: H, N/ z% h* q4 e$ J( Tdiagnosis, the child had a normal growth velocity at( X+ }% C0 }% \: E
the follow-up visit. It is hoped that his final adult
" h ^# L) P5 v4 sheight will not be affected.
; e+ C4 m2 d* n* Z* a' {Although rarely reported, the widespread avail-
7 H$ b% k* g0 s+ {ability of androgen products in our society may
& N3 i: x" q* \5 ?( E9 _indeed cause more virilization in male or female% \% z; v2 a1 X2 L1 Q0 r1 }
children than one would realize. Exposure to andro-4 p, V1 V5 R( \5 Y5 M* q. |% g2 |; C! k
gen products must be considered and specific ques-) N- |0 C( K+ P* P( ~, Q
tioning about the use of a testosterone product or0 ~5 |. C' o) _+ t: m& K4 B8 b
gel should be asked of the family members during
* Z P* u; W y( Ithe evaluation of any children who present with vir-" d$ `7 L0 W! ~
ilization or peripheral precocious puberty. The diag-. k6 J7 R# ]$ E1 w
nosis can be established by just a few tests and by
/ C1 a$ `0 g% y. A3 Qappropriate history. The inability to obtain such a) k# y. K) e( h; O2 }9 v
history, or failure to ask the specific questions, may6 C% Q- E2 @; R. m% V2 i! T
result in extensive, unnecessary, and expensive
! c, K, x: H; I4 G; Sinvestigation. The primary care physician should be4 @, E; g) Z, Z/ {% m( r7 s. F' u$ W
aware of this fact, because most of these children
4 _' L: w9 o& e9 W0 q0 m' s+ imay initially present in their practice. The Physicians’% O5 D! V$ ]( X3 C! P
Desk Reference and package insert should also put a
0 G, W" c( o5 p* _2 K7 I; C8 u: t9 m, fwarning about the virilizing effect on a male or! S& Z0 r* x: q7 p% T/ ]! I
female child who might come in contact with some-1 u7 c# }! W, d/ B
one using any of these products.5 z. U( H3 @) V/ h2 S9 D
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% O \# u$ D3 l, OEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;) ]- h; ^( k2 g* e: B5 M
2002: 565-628.
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puberty in children with tumours of the suprasellar pineal
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Skeletal Development of the Hand and Wrist. 2nd ed.
$ m+ Y2 Z+ V+ S+ s! iStanford, CA: Stanford University Press; 1959.* j# C/ D5 A" v% p
6. Physicians’ Desk Reference. Androgel 1% testosterone,: H9 }) I5 h) a; s- Y! r" S! p& w* _
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
3 j1 s: \0 Q4 T$ S6 vEconomics Company, Inc; 2004:3239-3241.
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