title: Severity of illness measures: issues and options.
mesh_terms: D003365:Costs and Cost Analysis; D003953:Diagnosis-Related Groups; D004194:Disease / Q000145:classification*; D006301:Health Services Needs and Demand; D006801:Humans; D009732:Nursing Care; D010347:Patient Care Planning; D011907:Rate Setting and Review / Q000379:methods*