. Author manuscript; available in PMC: 2011 Nov 2.
Published in final edited form as: J Pediatr Adolesc Gynecol. 2007 Apr;20(2):67–72. doi: 10.1016/j.jpag.2006.08.001
© 2007 North American Society for Pediatric and Adolescent Gynecology Published by Elsevier Inc.