Yuan, J.; Xu, M.; Li, J.; Li, N.; Chen, L.-Z.; Feng, Q.-S.; Zeng, Y.-X. Prognostic Value of Cystatin C in Patients With Nasopharyngeal Carcinoma: A Retrospective Study of 1063 Patients . Clinics 2016, 71 (6), 338-343. https://doi.org/10.6061/clinics/2016(06)09.