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Table 1 Table summarising the electronic information sources used. For a description of the abbreviations, see text

From: Systematic review of outcome domains and instruments used in clinical trials of tinnitus treatments in adults

Type of electronic search

Database

Number of items (n)

Academic databases

PubMed

759

EMBASE

244

CINAHL

145

CENTRAL

560

Clinical trial registers

ClinicalTrials.gov

141

ISRCTN

22

ICTRP

183

CDSR

23

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Trials

ISSN: 1745-6215