1. Clinical Epidemiology Research Unit, Mexican Institute of Social Security, Villa de Alvarez, Colima 28984, Mexico
2. Research Center in Minority Institutions, Robert Stempel College of Public Health, Florida International University, Miami, FL 33199, USA
3. Nephrology Unit, Mexican Institute of Social Security, Colima 28000, Mexico
4. School of Medicine, University of Colima, Colima 28040, Mexico