[1] Univ Puerto Rico UPR, Div Canc Control & Populat Sci, Comprehens Canc Ctr, San Juan, PR 00925 USA
[2] Grad Sch Publ Hlth, Dept Hlth Serv Adm, UPR Med Sci Campus, San Juan, PR 15261 USA
[3] Grad Sch Publ Hlth, Dept Biostat & Epidemiol, UPR Med Sci Campus, San Juan, PR USA
[4] UPR Comprehens Canc Ctr, Canc Prevent & Control Res CAPAC Training Program, Div Canc Control & Populat Sci, San Juan, PR USA
[5] Fac Nat Sci, Dept Math, UPR Rio Piedras Campus, San Juan, PR USA
[6] UPR, MDACC Partnership Excellence Canc Res Program, UPR Med Sci Campus, San Juan, PR USA
[7] Med Univ South Carolina, Dept Publ Hlth Sci, Charleston, SC USA
[8] Med Univ South Carolina, Hollings Canc Ctr, Charleston, SC USA
[9] UPR Comprehens Canc Ctr, Div Canc Med, San Juan, PR USA
[10] Sch Med, Dept Med, Hematol Oncol Program, UPR Med Sci Campus, San Juan, PR USA
[11] Univ Puerto Rico, Comprehens Canc Ctr, PMB 371,POB 70344, San Juan, PR 00936 USA