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All data were double-entered and validated using Epi-Data database v3.1 for entry (EpiData Association, Odense, Denmark). Data were analysed using SPSS v21 (IBM SPSS, Armonk, NY, USA).
Copyright and License information: ©2021 The Union
This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence CC-BY 4.0 (http://creativecommons.org/licenses/by/4.0) published by The Union (www.theunion.org).
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