1. Laboratory of Experimental Pharmacology, Institute of Clinical Research, Faculty of Medicine, National University of San Marcos, Lima, Peru
2. Section of Physiology, Faculty of Medicine, National University of San Marcos, Lima, Peru
3. Section of Biochemistry, Faculty of Medicine, National University of San Marcos, Lima, Peru
4. Faculty of Pharmacy and Biochemistry, National University of San Marcos, Lima, Peru
5. Department of Physiology, School of Medicine, National University of Trujillo, Trujillo, Peru