| http://www.w3.org/ns/prov#value | - This approach fails on the same grounds as comparisons withoverall statistics or with reports in the literature: the impossibility of identifying and matching on all the important prognostic factors, since important ones may be elusive.A study of ECaP (Exceptional Cancer Patients) participants, by Morgenstern and colleagues (639), discussed in chapter 2, is a good example of a matched study.
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