1. Epping-Jordan, J., Pruitt, S., Bengoa, R., Wagner, E.: Improving the quality of health care for chronic conditions. Qual. Saf. Health Care 13(4), 299–305 (2004)
2. Ward, B.W.: Multiple chronic conditions among us adults: A 2012 update (2014)
3. Gerteis, J., Izrael, D., Deitz, D., LeRoy, L., Ricciardi, R., Miller, T., Basu, J.: Multiple chronic conditions chartbook (2014)
4. Association, N.R.H., et al.: What’s different about rural health care, http://www.ruralhealthweb.org (2015)
5. Lee, W., Jiang, L., Phillips, C.D., Ohsfeldt, R.L.: Rural-urban differences in health care expenditures: Empirical data from us households. Adv. Public Health 2014, 1–8 (2014)