Puerto Rican migration and mainland health care: migration to big cities from rural areas.
D003695:Delivery of Health Care / Q000458:organization & administration*; D004641:Emigration and Immigration; D005006:Ethnicity; D006285:Health Planning; D006301:Health Services Needs and Demand; D009519:New York City; D011647:Puerto Rico / Q000208:ethnology; D012959:Socioeconomic Factors; D014481:United States; D014504:Urban Health