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- Correspondence to Dr Jorik Nonnekes, Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Rehabilitation, Nijmegen 6500 HB, The Netherlands; jorik.nonnekes{at}radboudumc.nl
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Face mask sign
Publication history
- Accepted September 9, 2021
- First published September 27, 2021.
Online issue publication
November 18, 2021
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- Previous version (27 September 2021).
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© Author(s) (or their employer(s)) 2021. No commercial re-use. See rights and permissions. Published by BMJ.
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