Humbert, Anja
Schmage, Petra
Harendza, Sigrid
Article History
Received: 20 February 2018
Accepted: 18 June 2018
First Online: 22 June 2018
Ethics approval and consent to participate
: The study was performed in accordance with the Declaration of Helsinki and Ethics Committee of the Chamber of Physicians approval. Patients do not need to give special consent for retrospective analysis of their data records because they sign an agreement for scientific use of their data when treatment is initiated. Students consented in the anonymized analysis of the patients treated by them.
: Not applicable.
: SH has a position as Section Editor to BMC Medical Education. AH and PS declare that they have no competing interests.
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