Leung, L. ., Yoon, J. ., Rubenstein, L. ., Post, E. ., Metzger, M. ., Wells, K. ., … Escarce, J. . (1969). Changing Patterns of Mental Health Care Use: The Role of Integrated Mental Health Services in Veteran Affairs Primary Care. Journal of the American Board of Family Medicine : JABFM, 31(1), 38-48. https://doi.org/10.3122/jabfm.2018.01.170157 (Original work published 1969)