From his Twitter bio: Surgeon/scientist promoting science in medicine and exposing quackery. Editor of Science-Based Medicine.
From his bio page on Science Based Medicine:
DAVID H. GORSKI, MD, PhD, FACS is Professor of Surgery and Oncology at the Wayne State University School of Medicine, a surgical oncologist at the Barbara Ann Karmanos Cancer Institute specializing in breast cancer surgery, and faculty in the WSU Graduate Program in Cancer Biology.