[1] Univ Puerto Rico, Grad Sch Publ Hlth, Dept Biostat & Epidemiol, San Juan, PR 00936 USA
[2] Univ Puerto Rico, Sch Med, Dept Med, San Juan, PR 00936 USA
[3] Univ Puerto Rico, Ctr Comprehens Canc, Div Canc Control, San Juan, PR 00936 USA
[4] Univ Puerto Rico, Ctr Comprehens Canc, Populat Sci Program, San Juan, PR 00936 USA