1. School of Medicine, Faculty of Health Sciences, Universidad Técnica de Manabí, Portoviejo 130102, Ecuador
2. Research Institute, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador
3. Department of Mathematics and Statistics, Institute of Basic Sciences, Technical University of Manabí, Portoviejo 130105, Ecuador
4. Statistics Department, University of Salamanca, 37007 Salamanca, Spain
5. Optometry Carrer, Faculty of Health Sciences, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador
6. Departamento de Medicina Veterinaria, Facultad de Ciencias Veterinarias, Universidad Técnica de Manabí, Portoviejo 130105, Ecuador
7. Island Medical Program, Faculty of Medicine, University of British Columbia, Victoria, BC V8P 5C2, Canada
8. Division of Medical Sciences, University of Victoria, Victoria, BC V8P 5C2, Canada