Insulin-like growth factors (IGF-I, free IGF and IGF-II) and insulin-like growth factor binding proteins (IGFBP-2, IGFBP-3, IGFBP-6 and ALS) in blood circulation. - Yu,H.; Mistry,J.; Nikar,M.J.; Khosravi,M.J.; Diamandis,A.; van Doorn,J.; Juul,A. (J Clin Lab Anal, 1999)