1. From the Center for Healthcare Organization and Implementation Research, Bedford VA Medical Center, Bedford, MA (Z.R., A.O., S.Z., G.K.J., A.J.R.); Department of Medicine, Section of General Internal Medicine, Boston University School of Medicine, Boston, MA (Z.R., A.J.R.); and Biostatistics Section, Center for Patient Safety and Quality Research, Boston Children’s Hospital, Boston, MA (A.O.).