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Zwarenstein M, Oxman A; Pragmatic Trials in Health Care Systems (PRACTIHC).Zwarenstein M, et al. Among authors: oxman a.J Clin Epidemiol. 2006 Nov;59(11):1125-6. doi: 10.1016/j.jclinepi.2006.05.010. Epub 2006 Aug 10.J Clin Epidemiol. 2006.PMID: 17027421No abstract available.
Aaserud M, Lewin S, Innvaer S, Paulsen EJ, Dahlgren AT, Trommald M, Duley L, Zwarenstein M, Oxman AD.Aaserud M, et al.BMC Health Serv Res. 2005 Nov 1;5:68. doi: 10.1186/1472-6963-5-68.BMC Health Serv Res. 2005.PMID: 16262902Free PMC article.