1. Department of Dermatology, Hospital General de Zona 32, Instituto Mexicano del Seguro Social, Tlalpan, Mexico City, Mexico,
2. Department of Rheumatology,
3. Department of Immunology,
4. Department of Physiology, Instituto Nacional de Cardiología Ignacio Chávez, Tlalpan, Mexico City, Mexico,
5. Department of Health Care, Universidad Autónoma Metropolitana - Xochimilco, Coyoacán, Mexico City, Mexico, and
6. School of Medicine, LaSalle University, Cuauhtémoc, Mexico City, Mexico