[1] Univ Puerto Rico, Div Canc Control & Populat Sci, Comprehens Canc Ctr, POB 363027, San Juan, PR 00936 USA
[2] Univ Puerto Rico, Grad Sch Publ Hlth, Dept Hlth Serv Adm, Med Sci Campus, San Juan, PR 00936 USA
[3] Univ Puerto Rico, Comprehens Canc Ctr, Puerto Rico Cent Canc Registry, San Juan, PR 00936 USA
[4] Univ Puerto Rico, Grad Sch Publ Hlth, Dept Social Sci, Med Sci Campus, San Juan, PR 00936 USA
[5] Univ Puerto Rico, Sch Med, Dept Emergency Med, Med Sci Campus, San Juan, PR 00936 USA