Prevalence of polycystic ovaries in women with self-reported symptoms of oligomenorrhoea and/or hirsutism: Northern Finland Birth Cohort 1966 Study. by Taponen, S, Ahonkallio, S, Martikainen, H, Koivunen, R, Ruokonen, A, Sovio, U, Hartikainen, A, Pouta, A, Laitinen, J, King, V, Franks, S, McCarthy, M, Järvelin, MR