Medical group practice in the United States: patterns of survival between 1969 and 1975.
D000288:Administrative Personnel; D000488:Allied Health Personnel; D006123:Group Practice / Q000458:organization & administration / Q000639:trends*; D007588:Job Satisfaction; D008962:Models, Theoretical; D011156:Population Density; D012959:Socioeconomic Factors; D014481:United States