1. Cytogenetics and Genomics Laboratory, Human Genetic Institute ‘Dr. Enrique Corona Rivera’, University of Guadalajara, Guadalajara, Jalisco 44340, M�xico
2. Cytogenetics Unit, Pediatric Hematology and Oncology Service, Hospital Civil of Guadalajara ‘Dr. Juan I. Menchaca’, Guadalajara, Jalisco 44340, M�xico
3. Pathological Anatomy Service, Hospital Civil of Guadalajara ‘Dr. Juan I. Menchaca’, Guadalajara, Jalisco 44340, M�xico
4. Colon and Rectum Service, Health Sciences University Center, University of Guadalajara, Guadalajara, Jalisco 44340, M�xico
5. Molecular Biology and Gene Therapy Institute, Health Sciences University Center, University of Guadalajara, Guadalajara, Jalisco 44340, M�xico