[1] Purdue Univ, Dept Publ Hlth, 812 W State St,Matthews Hall,Room 216, W Lafayette, IN 47907 USA
[2] Indiana Univ, Canc Prevent & Control Program, Simon Comprehens Canc Ctr, Indianapolis, IN 46204 USA
[3] Indiana Univ Purdue Univ, Dept Commun Studies, Indianapolis, IN 46202 USA
[4] Indiana Univ Sch Med, Dept Obstet & Gynecol, Indianapolis, IN 46202 USA
[5] Indiana Univ Sch Med, Dept Pediat, Indianapolis, IN 46202 USA