1. Universidad Nacional de Colombia; Department of Pediatrics, School of Medicine; Bogota Colombia
2. Clinica Colsanitas, Clinica Reina Sofia; Department of Internal Medicine; Carrera 31 No. 125A-53. Quinto piso Bogota Colombia
3. Herbert Wertheim College of Medicine, Florida International University; Division of Research & Information; 11200 SW 8th Street Modesto Maidique Campus, AHC1, #443 Miami Florida USA 33178