Developing, maintaining, and evaluating a sampling frame of institutions.
D005581:Foster Home Care; D006268:Health Facilities; D006761:Hospitals; D006765:Hospitals, Convalescent; D006782:Hospitals, Special; D009735:Nursing Homes; D009934:Organization and Administration; D011330:Prisons; D012494:Sampling Studies; D014481:United States; D014492:United States Public Health Service