Dr. Jon R. Davids, assistant chief of orthopaedics at Shriners Hospitals for Children — Northern California, played a leading role in the 12th annual meeting of the International Pediatric Orthopaedic Symposium (IPOS). Presented by the Pediatric Orthopaedic Society of North America (POSNA) and the American Academy of Orthopaedic Surgeons (AAOS), the meeting took place Dec. 8-12…