1. Distant metastases of nasopharyngeal carcinoma: a study of 256 male patients;Ahmad;J Surg Oncol,1986
2. Astragalus membranaceus. Monograph;Anon;Altern Med Rev,2003
3. Effects of radix astragali injection on apoptosis of lymphocytes and immune function in patients with systemic lupus erythematosus;Cai;Zhongguo Zhong Xi Yi Jie He Za Zhi,2006
4. High frequency of chromosome 3p deletion in histologically normal nasopharyngeal epithelia from southern Chinese;Chan;Cancer Res,2000
5. Four new oleanene derivatives from the seeds of Astragalus complantus;Cui;Chem Pharm Bull,1992