1. Medical student, School of Medicine, Universidad Popular del Estado de Tlaxcala, Tlaxcala, Mexico
2. Medical Resident, Department of Anatomical Pathology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
3. Medical student, Faculty of Medicine, Universidad Autónoma de Coahuila, Unidad Torreón, Mexico
4. Adjunct Professor of Pathology, Department of Anatomical Pathology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico