1 Department of Psychoimmunology, National Institute of Psychiatry "Ramón de la Fuente", Calzada México-Xochimilco 101, Colonia San Lorenzo Huipulco, Tlalpan, 14370 Mexico City, DF, Mexico.
2 Instituto de Inmunología, Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Santa Fe 3100 CP, 2000 Rosario, Argentina.
3 Research Group Immunophysiology, Institute of Physiology and Pathophysiology, Philipps University, 35037 Marburg, Germany.
4 Department of Microbiology, Immunology, Virginia Commonwealth University, 1101 E. Marshal Street, Richmond, VA 232980678, USA.
5 School of Medicine, National Autonomous University of Mexico, Avenida Universidad 3000, Coyoacan, 04510 Mexico City, DF, Mexico.