1. Instituto de Ingeniería Universidad Autónoma de Baja California Mexicali México
2. Department Chemical Sciences Medical University of Plovdiv Faculty of Pharmacy Plovdiv Bulgaria
3. Department Biochemistry and Microbiology Plovdiv University “P. Hilendarski” Faculty of Biology Plovdiv Bulgaria
4. Instituto Tecnológico de Mexicali Tecnológico Nacional de México Mexicali México