. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: J Am Acad Dermatol. 2011 Jun 16;67(1):e17–e27. doi: 10.1016/j.jaad.2011.04.008
© 2011 American Academy of Dermatology, Inc. Published by Mosby, Inc. All rights reserved.