Received: 9 September 2020
Accepted: 12 April 2021
First Online: 21 April 2021
: This study was approved by the ethics committee of the George Papanikolaou General Hospital of Thessaloniki with approval number 4/3.1.2018. The patients provided verbal consent. The committee’s reasoning was that since this is a retrospective study into the hospital’s archives, formal consent is not required. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable
: All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript.