Text and Data Mining valid from 2019-11-14
Received: 23 April 2019
Accepted: 29 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: The study was approved by the Medical Ethical Committee of the State Chamber of Medicine of Rhineland Palatinate in Mainz, Germany (reference number 837.374.14 (9613)).
: The patients or their parents/guardians gave a written consent to publication of their anonymized clinical data.
: The authors declare that they have no competing interests.