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Addendum to article on 'visit-based sampling'.
Shepard DS, Neutra R. Shepard DS, et al. Am J Public Health. 1979 Sep;69(9):954. doi: 10.2105/ajph.69.9.954. Am J Public Health. 1979. PMID: 474853 Free PMC article. No abstract available.
Effectiveness and costs of veterans affairs hypertension clinics.
Stason WB, Shepard DS, Perry HM Jr, Carmen BM, Nagurney JT, Rosner B, Meyer G. Stason WB, et al. Among authors: shepard ds. Med Care. 1994 Dec;32(12):1197-215. doi: 10.1097/00005650-199412000-00004. Med Care. 1994. PMID: 7967859
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