For information please see the following links:
http://pediatrics.aappublications.org/cgi/content/full/118/Supplement_2/S197
http://www.allbusiness.com/health-care-social-assistance/ambulatory-health-services/349431-1.html
http://www3.interscience.wiley.com/journal/118672299/abstract?CRETRY=1&SRETRY=0
http://linkinghub.elsevier.com/retrieve/pii/S1574626708000268
http://www.aap.org/pressroom/aappr-feb08mailing.htm
http://www.aap.org/advocacy/releases/feb08studies.htm