1. Department of Surgery , Division of Cardiothoracic Surgery, , Quito , Ecuador
2. Hospital Metropolitano , Division of Cardiothoracic Surgery, , Quito , Ecuador
3. Department of Internal Medicine , Division of Radiology, , Quito , Ecuador
4. Hospital Metropolitano , Division of Radiology, , Quito , Ecuador
5. Department of Internal Medicine , Division of Pathology, , Quito , Ecuador
6. Hospital Metropolitano , Division of Pathology, , Quito , Ecuador
7. Department of Surgery, Hospital Metropolitano , Quito , Ecuador
8. Universidad San Francisco de Quito (USFQ) , Quito , Ecuador