Consistency and change in choice of medical care for preschool children.
D002662:Child Health Services / Q000706:statistics & numerical data*; D002675:Child, Preschool; D003258:Consumer Behavior; D006798:Housing; D006801:Humans; D007182:Income; D009519:New York City; D010044:Outpatient Clinics, Hospital / Q000706:statistics & numerical data; D010817:Physician-Patient Relations; D011314:Preventive Health Services / Q000706:statistics & numerical data; D012494:Sampling Studies; D012923:Social Class; D012937:Social Mobility; D012959:Socioeconomic Factors