Received: 8 July 2019
Accepted: 15 July 2019
First Online: 22 July 2019
Ethics approval and consent to participate
: The present study did not change the normal management of our patients, and for this reason an approval from an ethical committee was waved. All patients signed informed consent to the medical management and to the use of their clinical data for scientific purposes, including scientific publication. An approval from the ethical committee of the Universitätsmedizin Charite Berlin was given (EA4/128/12).
: The authors declare that they have no competing interests.