1. Physics Institute; Universidad Autónoma de San Luis Potosí; Ave. Dr. Manuel Nava #6 San Luis Potosí SLP 78290 México
2. Department of Physiology; Universidad Autónoma de San Luis Potosí School of Medicine; Ave. V. Carranza 2405 San Luis Potosí SLP 78290 Mexico
3. Department of Cell Biology; Emory University School of Medicine; Atlanta GA 30322 USA