1. Systemic Autoimmune Diseases Research Unit, Specialties Hospital UMAE, Mexican Social Security Institute, Puebla, México
2. Department of Rheumatology, Medicine School Meritorious Autonomous University of Puebla, Puebla, Mexico
3. Research in Health Coordination, Mexican Social Security Institute, Puebla, México
4. Direction of Health Education and Research, Specialties Hospital UMAE, Mexican Social Security Institute, Puebla, México