Johns Hopkins Hospital - Pediatric Gastroenterology, Baltimore, Maryland, United States
Children's Hospital Boston-Harvard Medical School; Division of Gastoenterology, Boston, Massachusetts, United States
Seattle Children's Hospital, Seattle, Washington, United States
Unidad De Dialisis La Loma S.C., Pureto Vallarta, Mexico
Clínica San Cosme Centro Especializado en el Tratamiento de Enfermedades Renales S.C, Aguascalientes, Mexico
Nefros Investigación S.C., Delegación Coyoacan, Mexico