- Identification of serum amyloid a protein as a potentially useful biomarker to monitor relapse of nasopharyngeal cancer by serum proteomic profiling. Cho, W.C., Yip, T.T., Yip, C., Yip, V., Thulasiraman, V., Ngan, R.K., Yip, T.T., Lau, W.H., Au, J.S., Law, S.C., Cheng, W.W., Ma, V.W., Lim, C.K. Clin. Cancer Res. (2004)