12Mainous AG 3rd, Baker R, Love MM, et al. Continuity of care and trust in one's doctor: Evidence from primary care in the United States and the UK. Fam Med. 2001 Jan; 33( 1 ):22 -7. 13Starfield B. Medical care: Balancing health requirements, services and innovation. New York City: Oxford University Press; 1998. 14Starfield B, Shi L, Machinko J.The Milbank Quarterly. 2005; 83( 3 ):457 -502 15National Commission on Avoidance Priorities. Preventive care: A national profile on use, variations, and health benefits. Washington, DC: Collaboration for Prevention; 2007 Aug. 16National Commission on Avoidance Priorities. Data required to evaluate usage of high-value preventive care: A short report from the National Commission on Avoidance Priorities.