[1] Univ New Mexico, Sch Med, Dept Internal Med, Albuquerque, NM 87131 USA
[2] Univ New Mexico, Canc Control & Populat Sci Res Program, Canc Res Facil, Comprehens Canc Ctr, Room G11,MSC07 4025,1 Univ New Mexico, Albuquerque, NM 87131 USA
[3] Univ North Carolina Chapel Hill, Ctr Hlth Promot & Dis Prevent, Chapel Hill, NC USA
[4] Univ North Carolina Chapel Hill, Lineberger Comprehens Canc Ctr, Chapel Hill, NC USA
[5] Univ North Carolina Chapel Hill, Gillings Sch Global Publ Hlth, Dept Hlth Policy & Management, Chapel Hill, NC USA
[6] St Jude Childrens Res Hosp, Dept Epidemiol & Canc Control, HPV Canc Prevent Program, Memphis, TN USA