1. Division of Hematology, Mayo Clinic, Rochester, Minnesota.
2. Division of Oncology, Mayo Clinic, Rochester, Minnesota.
3. Internal Medicine, School of Medicine at the Permian Basin, Texas Tech University Health Sciences Center, Odessa, Texas.
4. Departamento de Biología Celular y Tisular, Facultad de Medicina, Universidad Nacional Autónoma de México, México City, Mexico.
5. Family Medicine, School of Medicine at the Permian Basin, Texas Tech University Health Sciences Center, Odessa, Texas.
6. Department of Pathology, Texas Tech University Health Sciences Center, Lubbock, Texas.
7. Servicio de Gastrocirugía, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México.
8. Department of Cell Physiology and Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas.