Vause TD, Cheung AP, Sierra S, Claman P, Graham J, Guillemin JA, Lapensée L, Steward S, Wong BC, Min J, Cadesky K, Havelock J, Roberts J; Society of Obstetricians and Gynecologists of Canada..

J Obstet Gynaecol Can. 2010 May;32(5):503-11. French. No abstract available.
https://www.ncbi.nlm.nih.gov/pubmed/20500960