1. Department of Surgical Support Services, Instituto Nacional de Rehabilitación “Luis Guillermo Ibarra Ibarra”, Mexico City, Mexico
2. Department of Angiology and Vascular Surgery, Hospital de Especialidades, Centro Médico Nacional La Raza “Dr. Antonio Fraga Mouret”, Instituto Mexicano Del Seguro Social, Mexico City, Mexico
3. Department of Internal Medicine, Hospital General de Zona N.o 4, Instituto Mexicano Del Seguro Social, Guadalupe, Mexico