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Authors
Grohmann, Marcus
Grosch, Janina
Conrady, Beate
Schomakers, Lena
Witte, Anna Kristina
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Funding
Funding for this research was provided by:
Bayerische Staatsministerium für Wirtschaft, Landesentwicklung und Energie, Germany
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Article History
Received: 27 September 2022
Accepted: 10 November 2023
First Online: 15 November 2023
Competing interests
: MG, JG, LS, AKW are employed at the HTK. Analyzed test centers were operated by the HTK during the study period but handed the entire operation over to another provider end of 2021 ensuring there is nether financial nor non-financial interests corresponding to the publication. BC declares no competing interest.
