[1] Juárez University of Durango State,Faculty of Medicine and Nutrition
[2] Juárez University of Durango State,Institute for Scientific Research “Dr. Roberto Rivera Damm”
[3] Secretary of Health,General Hospital
[4] Campus Benjamin Franklin,Institute for Microbiology and Hygiene
[5] Charité Medical School,undefined
[6] Current address: Medical and Scientific Affairs,undefined
[7] Roche Molecular Systems,undefined