. 2021 Oct 5;111(2):368–375. doi: 10.1111/apa.16128
© 2021 Foundation Acta Pædiatrica. Published by John Wiley & Sons Ltd
This article is being made freely available through PubMed Central as part of the COVID-19 public health emergency response. It can be used for unrestricted research re-use and analysis in any form or by any means with acknowledgement of the original source, for the duration of the public health emergency.