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Assessing observational studies of medical treatments.
Hartz A, Bentler S, Charlton M, Lanska D, Butani Y, Soomro GM, Benson K. Hartz A, et al. Emerg Themes Epidemiol. 2005 Sep 1;2:8. doi: 10.1186/1742-7622-2-8. Emerg Themes Epidemiol. 2005. PMID: 16137327 Free PMC article.
Methodologic issues in observational studies.
Hartz A, Marsh JL. Hartz A, et al. Clin Orthop Relat Res. 2003 Aug;(413):33-42. doi: 10.1097/01.blo.0000079325.41006.95. Clin Orthop Relat Res. 2003. PMID: 12897594
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