Ethics approval and consent to participate
HEAD AND NECK CANCER
Human ethics was reviewed by the full review board of the Faculty of Medicine, Chulalongkorn University (IRB No.534/62). Patients in the Head and Neck Cancer Unit, King Chulalongkorn Memorial Hospital, from January to September 2020, matched with the inclusion and exclusion criteria were recruited after signing the written informed consent. All procedures 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.