1. Rheumatology Department, XXI Century National Medical Center, Mexican Institute of Social Security, Mexico City, Mexico.
2. Ophthalmology Department, XXI Century National Medical Center, Mexican Institute of Social Security, Mexico City, Mexico.
3. Rheumatology Department, Regional General Hospital 20, Mexican Institute of Social Security, Tijuana Baja California, Mexico.
4. National Institute of Diagnostic and Epidemiological Reference, Ministry of Health, Mexico City, Mexico.
5. Immunology Department, National School of Biological Sciences, National Politecnic Institute, Mexico City, Mexico.