1. High Specialty Medical Unit, Hospital of Gynecology and Pediatrics # 48, Mexican Institute of Social Security, León, Mexico.
2. Department of Medical Science, Division of Health Science, University of Guanajuato, Campus León, León Gto, México.
3. Nursing Department, University of Guanajuato, Campus León, León, México.
4. Department of Pediatric Endocrinology, Hospital San Jose, Celaya Gto, México.