Manpower utilization practices in physician offices: the role of physician extenders.
D004526:Efficiency; D006801:Humans; D009722:Nurse Practitioners / Q000706:statistics & numerical data*; D010823:Physician Assistants / Q000706:statistics & numerical data*; D011331:Private Practice; D012044:Regression Analysis; D014481:United States; D000078329:Workforce