Text and Data Mining valid from 2019-10-17
Received: 23 May 2019
Revised: 16 August 2019
Accepted: 2 September 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: After participants had given their written informed consent, blood samples were collected between 8:15 and 9:00 am by an independent medical doctor that was not involved in subsequent sample analysis. Right after blood withdrawal, samples received a number and no reference could be made from a sample to an individual subject, i.e., the samples were fully anonymous. Therefore, ethical approval was not necessary.
: Not applicable.
: The authors declare that they have no competing interests.