1 Neurology Service, Hospital Central "Dr. Ignacio Morones Prieto," Facultad de Medicina Universidad Autonoma de San Luis Potosí San Luis Potosí Mexico.
2 Rheumatology Service, Hospital Central "Dr. Ignacio Morones Prieto," Facultad de Medicina Universidad Autonoma de San Luis Potosí San Luis Potosí Mexico.
3 Dermatology Service, Hospital Central "Dr. Ignacio Morones Prieto," Facultad de Medicina Universidad Autonoma de San Luis Potosí San Luis Potosí Mexico.