Keinänen, Arvi
Uittamo, Johanna
Marinescu-Gava, Magdalena
Kainulainen, Satu
Snäll, Johanna
Article History
Received: 11 December 2020
Accepted: 9 March 2021
First Online: 19 March 2021
Declarations
:
: This article does not contain any studies with human participants or animals performed by any of the authors. The study was approved by the Internal Review Board of the Head and Neck Centre, Helsinki University Central Hospital, Finland (HUS/66/2018). The Internal Review Board of the Head and Neck Centre waived the requirement of informed consent due to the retrospective nature of this study. The guidelines of the Declaration of Helsinki were followed in this study.
: Not applicable.
: The authors declare that they have no competing interests.