HIGHLIGHTS
- who: Jasmin Helbach from the Department of Health Services Research, School of Medicine and Health, Ossietzky University Oldenburg, Oldenburg, Germany have published the research: Restrictions and their reporting in systematic reviews of effectiveness: an observational study, in the Journal: (JOURNAL)
- what: The aim of this research was to examine the use of restrictions regarding language, publication period, and study type as well as transparency of reporting in SRs of effectiveness. Data extraction For the purposes of the current analysis, these 535 SRs on effectiveness were included. The main reasons for restrictions were an attempt to . . .
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