| Literature DB >> 2567902 |
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Abstract
Entities:
Keywords: Americas; Correlation Studies; Data Analysis; Delivery Of Health Care; Demographic Factors; Developed Countries; Economic Factors; Europe; Health; Health Personnel; Health Services; Historical Survey; Income; Infant Mortality--changes; Intermediate Variables; Maternal Health Services--changes; Maternal Mortality--changes; Maternal-child Health Services; Medicine--changes; Midwives; Mortality; Netherlands; New Zealand; North America; Northern America; Northern Europe; Oceania; Population; Population Dynamics; Primary Health Care; Research Methodology; Social Class; Socioeconomic Factors; Socioeconomic Status; Statistical Studies; Studies; United Kingdom; United States; Western Europe
Mesh：
Year: 1989 PMID： 2567902
Source DB: PubMed Journal: Lancet ISSN： 0140-6736 Impact factor: 79.321