. Author manuscript; available in PMC: 2013 Apr 22.
Published in final edited form as: J Pediatr Adolesc Gynecol. 2011 May 20;25(2):93–97. doi: 10.1016/j.jpag.2011.03.001
© 2011 North American Society for Pediatric and Adolescent Gynecology. Published by Elsevier Inc.