1. Laboratorio de Respiración del Instituto de Investigaciones de la Altura; Universidad Peruana Cayetano Heredia; Lima Peru
2. Facultad de Medicina Alberto Hurtado; Universidad Peruana Cayetano Heredia; Lima Peru
3. Section of Pediatric Sleep Medicine, Department of Pediatrics; and Comer Children's Hospital, Pritzker School of Medicine, The University of Chicago; Chicago Illinois
4. Hospital Nacional Cayetano Heredia; Lima Peru