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Dr. Ratiner trained at the Univ of CA San Francisco (UCSF). In 1999, he began a Rheumatology practice in the San Fernando Valley of Los Angeles. He is a Clinical Instructor of Rheumatology at UCLA. He is a frequent speaker at local hospitals to physicians and at community centers to patients on topics such as Osteoarthritis, Rheumatoid Arthritis, Gout, Osteoporosis, Lupus, and Fibromyalgia. Dr. Ratiner also has a special interest in PRP and Stem Cell therapy for the treatment of arthritis.