1. Department of Biomedicine, Health Sciences Institute; Veracruzana University; Luis Castelazo-Ayala s/n, Industrial-Animas Xalapa Veracruz 91190 México
2. Laboratory of Neuropsychiatry, Universidad Autónoma de Puebla; 14 Sur 6301, CU San Manuel Puebla Puebla 72570 México
3. Department of Physiology; National Biological School of Sciences; Prolongación de Carpio and Plan de Ayala s/n, Santo Tomas, IPN México DF 11340 México
4. Institute of Cellular Physiology; National University of Mexico; A.P. 70-250 México DF 04510 México