1. Laboratory of Pathology and Cytopathology “Dr. Miguel Benavides”, Morelia 58260, Michoacán, Mexico
2. High Specialty Visual Clinic, Acámbaro 38600, Guanajuato, Mexico
3. Department of Genetics and Molecular Biology, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Mexico City 07360, Mexico
4. Department of Surgical Sciences, Uppsala University, 752 36 Uppsala, Sweden