[1] Univ Puerto Rico, Ctr Comprehens Canc, San Juan, PR 00927 USA
[2] Tufts Univ, Sch Med, Boston, MA 02111 USA
[3] Puerto Rico Behav Risk Factor Surveillance Syst, Puerto Rico Dept Hlth, San Juan, PR USA
[4] Univ Texas Houston, Houston, TX USA
[5] Univ Puerto Rico Med Sci Campus, San Juan, PR 00927 USA