Dr. Ralph Green is a medical doctor and research scientist on the faculty of the University of California, Davis where he is a distinguished professor of pathology and medicine. He has carried out research on B-12 for over 40 years.
Dr. Ralph Green is a medical doctor and research scientist on the faculty of the University of California, Davis where he is a distinguished professor of pathology and medicine. He has carried out research on B-12 for over 40 years.