Funding for this research was provided by:
Text and Data Mining valid from 2019-12-01
Received: 29 July 2019
Accepted: 19 November 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: This study was conducted with the approval of the regional ethics committee at Leiden University Medical Center. The IMPROVED study was approved by the Medical Ethics Committees of all participating hospitals. The RETRO study was approved by the ethics committee of the Friedrich-Alexander University of Erlangen-Nuremberg and local ethics committees of the external centers as well as the Paul Ehrlich Institute. Informed consent was obtained from all participants.
: Not applicable.
: MM is an employee of Inova Diagnostics; he holds no shares or stocks. All other authors declare that they have no competing interests.