Genetic and environmental factors in the aetiology of menstrual, premenstrual and neurotic symptoms: A population-based twin study
Psychological Medicine
http://www.ncbi.nlm.nih.gov/pubmed/?term=Genetic%20and%20environmental%20factors%20in%20the%20aetiology%20of%20menstrual%2C%20premenstrual%20and%20neurotic%20symptoms%3A%20A%20population-based%20twin%20study.