- Guthrie Robert Packer Hospital
- Brookdale Hospital and Medical Center, Brooklyn, N.Y. (Internal Medicine)
- American Board of Internal Medicine (Oncology and Hematology)
- Universidad del Noreste, Tampico, Tamaulipas, Mexico
- New York - Presbyterian Brooklyn Methodist Hospital, State University New York Health Sciences School of Medicine, Brooklyn, N.Y.
- Maimonides Hospital Medical Center, Brooklyn, N.Y. (Oncology and Hematology)