1. Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Rockville, Maryland, USA
2. Basic Health International, Pittsburgh, Pennsylvania, USA
3. Instituto de Investigaciones en Ciencias de la Salud, Universidad Nacional de Asunción, San Lorenzo, Paraguay
4. Medical College of Wisconsin, Milwaukee, Wisconsin, USA
5. Research Unit, El Salvador National Institute of Health (INS), San Salvador, El Salvador
6. The Mount Sinai Hospital, New York, New York, USA
7. Department of Epidemiology, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, USA
8. Rutgers New Jersey Medical School, Newark, New Jersey, USA
9. Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA
10. Cleveland Clinic Lerner College of Medicine, Cleveland, Ohio, USA