PDE8A genetic variation, polycystic ovary syndrome and androgen levels in women - Chen, C; Wickenheisser, J; Ewens, K G; Ankener, W; Legro, R S; Dunaif, A; McAllister, J M; Spielman, R S; Strauss, J F, 3rd (Mol Hum Reprod, 2009)