1. Epidemiology of multimorbidity and implications for health care, research, and medical education: a cross-sectional study;The Lancet,2012
2. Challenges to primary care from co- and multi-morbidity;Primary Health Care Research & Development,2011
3. The increasing burden and complexity of multimorbidity;BMC Public Health,2015
4. Hickam DH, Weiss JW, Guise JM, et al. Outpatient Case Management for Adults with Medical Illness and Complex Care Needs. Comparative Effectiveness Review No. 99. (Prepared by the Oregon Evidence based Practice Center under Contract No. 290-2007-10057-I.) AHRQ Publication No.13- EHC031-EF. Rockville, MD: Agency for Healthcare Research and Quality; January 2013. http://effectivehealthcare.ahrq.gov/search-for-guides-reviews-and-reports/?pageaction=displayproduct&productid=733.
5. The complex patient: A concept clarification. Nurs;Health Sci,2017