William G. Mackenzie, M.D., a world-renowned pediatric orthopaedic surgeon, will speak at Shriners Hospitals for Children — Northern California on May 1, 2018 as visiting professor for the 2018 R. Kirklin Ashley Lectureship. The Ashley Lectureship is organized by the Department of Orthopaedics to advance care through clinical excellence and continuing education. The program is…