Acceptability clinical trials 1 Clinical trials 1 Head and Neck Neoplasms 1 Head and Neck research Humans 1 Observational Studies as Topic 1 Patient Acceptance of Health Care 1 Patient Preference 1 Patient Selection 1 Randomized Controlled Trials as Topic 1 Research Personnel 1 Trial design 1 Trial recruitment 1 adult 1 article 1 controlled study 1 female 1 head 1 head and neck tumor 1 human 1 intervention study 1 major clinical study 1 male 1 medical research 1 neck 1 observational study 1 patient attitude 1 patient preference 1 patient selection 1 personnel 1