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.
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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.