1. Touch Research Institutes, Department of Pediatrics, University of Miami, School of Medicine, USA
2. University of Alabama, Department of Human Development and Family Studies, PO Box 870160, Tuscaloosa, AL 35487-0160, USA
3. Division of Disease Prevention, Department of Psychiatry & Behavioral Sciences, University of Miami, School of Medicine, USA
4. CENISMI/Robert Reid Cabral Children Hospital, Santo Domingo, Dominican Republic
5. Miami-Dade County Health Department/Florida Department of Health, USA