Source:
Acta obstetricia et gynecologica Scandinavica [Acta Obstet Gynecol Scand] 2011 Jul; Vol. 90 (7), pp. 802-7. Date of Electronic Publication: 2011 May 20.Publisher: Wiley Country of Publication: United States NLM ID: 0370343 Publication Model: Print-Electronic Cited Medium: