[1] Univ Miami, Sch Med, Mailman Ctr Child Dev, Dept Pediat, 1601 NW 12th Ave, Miami, FL 33136 USA
[2] Univ Miami, Miller Sch Med, Dept Publ Hlth Sci, Div Biostat, 1120 NW 14th ST, Miami, FL 33136 USA
[3] Univ Texas Hlth Sci Ctr Houston, Sch Publ Hlth Dallas, 2777 North Stemmons Freeway,Suite 8400, Dallas, TX 75207 USA
[4] Univ Texas Hlth Sci Ctr Houston, Ctr Pediat Populat Hlth, Sch Publ Hlth, 2777 North Stemmons Fwy,Suite 8400, Dallas, TX 75207 USA