1. Division of Cancer Control and Population Sciences University of Puerto Rico Comprehensive Cancer Center San Juan Puerto Rico
2. Puerto Rico Central Cancer Registry University of Puerto Rico, Comprehensive Cancer Center San Juan Puerto Rico
3. Department of Health Services Administration, Graduate School of Public Health, Medical Sciences Campus University of Puerto Rico San Juan Puerto Rico
4. Department of Population and Quantitative Health Sciences University of Massachusetts Chan Medical School Worcester Massachusetts USA
5. Auxilio Mutuo Hospital San Juan Puerto Rico