1. Becoming less usual: understanding the decline in the number of people with a usual source of care Author(s): Tavares, Jane L., authorCohen, Marc A., author Publication: New York, NY : Milbank Memorial Fund, September 2023 Subject(s): AgedHealthcare Disparities -- ethnologyHealthcare Disparities -- trendsManaged Care ProgramsPatient-Centered Care -- trendsSocial Determinants of HealthSocioeconomic FactorsUnited States