1. Department of Neonatology; Women's Hospital, Secretariat of Health; Sinaloa Mexico
2. Research Department, Faculty of Medicine; Autonomous University of Sinaloa; Sinaloa Mexico
3. Research Department ; Women's Hospital, Secretariat of Health; Sinaloa Mexico
4. Department of Perinatology; Women's Hospital, Secretariat of Health; Sinaloa Mexico
5. Medicine Department; Gulf Coast Medical Center; Panama City Florida USA