| Literature DB >> 23159105 |
Beatrice Nojilana, LaPrincess Brewer, Debbie Bradshaw, Pamela Groenewald, Elsie Helena Burger, Naomi S Levitt.
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Year: 2012 PMID: 23159105 DOI: 10.1016/j.jclinepi.2012.07.017
Source DB: PubMed Journal: J Clin Epidemiol ISSN: 0895-4356 Impact factor: 6.437