1
Among all menopausal women (occurring in 16?2 of premenopausal, 39?7 of perimenopausal and 35?0* Correspondence: elina.hemminki@thl.fi 1 National Institute for Health and Welfare (THL), P.O. Box 3000271, Helsinki, Finland Full list of author information is available at the end of the articleof postmenopausal women). In a Finnish populationbased study by Hemminki et al. (1995), 28 of women aged