| Literature DB >> 2240873 |
Abstract
Entities:
Keywords: Empirical Approach; Health Care and Public Health
Mesh:
Substances:
Year: 1990 PMID: 2240873 DOI: 10.7326/0003-4819-113-10-729
Source DB: PubMed Journal: Ann Intern Med ISSN: 0003-4819 Impact factor: 25.391