title: Hospital costs in Massachusetts: a methodological study.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003365:Costs and Cost Analysis; D004180:Direct Service Costs; D004469:Economics, Hospital; D005260:Female; D006760:Hospitalization; D006761:Hospitals / Q000592:standards; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007350:Insurance, Hospitalization; D008297:Male; D008404:Massachusetts; D008875:Middle Aged; D012044:Regression Analysis; D013223:Statistics as Topic