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J Clin Endocrinol Metab 88: 3431\u20133436.","DOI":"10.1210\/jc.2002-021415"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5 Guthrie RD, Smith DW, Graham CB (1973) Testosterone treatment for micropenis during early childhood. J Pediatr 83: 247\u2013252.","DOI":"10.1016\/S0022-3476(73)80484-6"},{"key":"6","doi-asserted-by":"crossref","unstructured":"6 Fujieda K, Matsuura N (1987) Growth and maturation in the male genitalia from birth to adolescence II: change of penile length. Acta Paediatr Jpn 29: 220\u2013223.","DOI":"10.1111\/j.1442-200X.1987.tb00036.x"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7 Ishii T, Matsuo N, Inokuchi M, Hasegawa T (2014) A cross-sectional growth reference and chart of stretched penile length for Japanese boys aged 0\u20137 years. 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