Mattocks KM, Cunningham K, Elwy AR, Finley EP, Greenstone C, Mengeling MA, Pizer SD, Vanneman ME, Weiner M, Bastian LA. Recommendations for the Evaluation of Cross-System Care Coordination from the VA State-of-the-art Working Group on VA/Non-VA Care. J Gen Intern Med. 2019 05; 34(Suppl 1):18-23.