1. Department of Dermatology, Hospital General de Zona 2-A “Troncoso”, Instituto Mexicano del Seguro Social, Mexico City, Mexico
2. Department of Immunology, Instituto Nacional de Cardiología Ignacio Chavez, Mexico City, Mexico
3. School of Medicine, LaSalle University, Mexico City, Mexico
4. Department of Health Care, Universidad Autónoma Metropolitana, Mexico City, Mexico