S Hammarbäck Publications Bäckström T, Heinemann Klaas, Nyberg S, Hammarbäck S, Definition and prevalence of premenstrual syndromes. Gynaecology Forum. 2009; 14(3).
Bäckström T, Heinemann Klaas, Nyberg S, Hammarbäck S, Definition and prevalence of premenstrual syndromes. Gynaecology Forum. 2009; 14(3).