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. 2020 Dec 21;7(1):e000770. doi: 10.1136/bmjresp-2020-000770

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.

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(A) Graph of Agency for Healthcare Research and Quality tool for quality/risk of bias of cross-sectional studies. (B) Graph of Quality Assessment of Diagnostic Accuracy Studies 2 tool for diagnostic test accuracy studies.