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Authors
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Chen, Qingui
Toorop, Myrthe M. A.
de Boer, Mark G. J.
Rosendaal, Frits R.
Lijfering, Willem M.
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Article History
Received: 24 June 2020
Accepted: 25 September 2020
First Online: 6 October 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board of the Leiden University Medical Center for observational studies (Reference number Covid Commission 2020–029). Consent to participate was waived given the nature of de-identified data.
: Not applicable.
: The authors declare that they have no competing interests.
