Citation: Robertson MM, Waldron L, Robbins RS, Chamberlin S, Penrose K, Levin B, Kulkarni S, Braunstein SL, Irvine MK, Nash D. Using Registry Data to Construct a Comparison Group for Programmatic Effectiveness Evaluation: The New York City HIV Care Coordination Program. Am J Epidemiol. 2018 Sep 1;187(9):1980-1989. doi: 10.1093/aje/kwy103.