Centre for Applied Health Economics, School of Medicine and Dentistry, Griffith University, Nathan, Queensland, Australia (T.W., P.S., J.B., M.D.); Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia (T.W., P.S., J.B., M.D.); Murdoch Children’s Research Institute, Parkville, Victoria, Australia (M.B.D.); and Victorian Clinical Genetics Services, Parkville, Victoria, Australia (M.B.D.)