Text and Data Mining valid from 2019-01-31
Received: 29 December 2017
Accepted: 16 January 2019
First Online: 31 January 2019
Ethics approval and consent to participate
: A written informed consent was obtained from the control participants and the two study groups were approved by the local ethics committee (number 0738–16 and 02–049).
: Not applicable
: The authors declare that they have no competing interests.
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