Sari, W.I. and Purwanza, S.W. 2022. Correlation between Age, Gender, and Formal Education with Symptom Clusters in Head and Neck Cancer Patients: An Observational Study. Health Information : Jurnal Penelitian. 14, 2 (Dec. 2022), 153–160. DOI:https://doi.org/10.36990/hijp.v14i2.494.