1. Head and Neck Department; Surgery Division; Instituto Nacional de Cancerología (INCan); Mexico City Mexico
2. Clinical Research Division; Surgery Division; Instituto Nacional de Cancerología (INCan); Mexico City Mexico
3. Pathology Department; Surgery Division; Instituto Nacional de Cancerología (INCan); Mexico City Mexico
4. Research Division; Instituto Nacional de Cardiología (INCan), Ignacio Chávez; Mexico City Mexico
5. Surgery Division; Instituto Nacional de Cancerología (INCan); Mexico City Mexico