Received: 29 December 2019
Accepted: 26 February 2020
First Online: 16 March 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of St. Marianna University School of Medicine (approval no. 4302).
: Informed consent was not necessarily due to the retrospective nature of the study. Thus, the need for individual written informed consent was waived. However, a declaration of data use was published on the website. The study information was published on the internet since patients could use the official department website to opt out of the study if they did not want their data used for research purposes.
: The authors declare that they have no competing interests.