Evaluation of treatment- and disease-related symptoms in advanced head and neck cancer: validation of the national comprehensive cancer network-functional assessment of cancer therapy-head and neck cancer symptom index-22 (NFHNSI-22).

Evaluation of treatment- and disease-related symptoms in advanced head and neck cancer: validation of the national comprehensive cancer network-functional assessment of cancer therapy-head and neck cancer symptom index-22 (NFHNSI-22).