1. Hematology Laboratory, Regional Research Center, Autonomous University of Yucatán, Yucatán, Mexico
2. Endocrinology Department, National Institute of Cardiology Ignacio Chávez, México City, Mexico
3. Rheumatology Department, Hospital Juárez de México, México City, Mexico
4. Genetic Laboratory, Regional Research Center, Autonomous University of Yucatán, Yucatán, Mexico
5. Rheumatology Department, Hospital General Dr. Agustín O’Horán, Health Service Yucatán, Yucatán, Mexico
6. Rheumatology Department, Regional Hospital General (ISSSTE), Health Service Yucatán, Yucatán, Mexico