1. Proportion of physicians in large group practices continued to grow in 2009-11;Welch;Health Aff,2013
2. Physician consolidation: rapid movement from small to large group practices, 2013-15;Muhlestein;Health Aff,2016
3. Physician practice benchmark survey,2022
4. Recent changes in physician practice arrangements: private practice dropped to less than 50 percent of physicians in 2020;Kane,2021