Breaking down the categories.
D000328:Adult; D019538:Health Care Surveys; D006801:Humans; D008875:Middle Aged; D009718:Nurse Administrators / Q000191:economics / Q000600:supply & distribution; D011365:Professional Practice Location; D012456:Salaries and Fringe Benefits; D012573:School Nursing / Q000191:economics; D014481:United States; D000078329:Workforce