Mitchell, P. H., Powell, L., Blumenthal, J., Norten, J., Ironson, G., Pitula, C. R., … Berkman, L. F. (2003). A short social support measure for patients recovering from myocardial infarction: The ENRICHD Social Support Inventory. Journal of Cardiopulmonary Rehabilitation, 23(6), 398–403. https://doi.org/10.1097/00008483-200311000-00001