Ze-Peng Du, Zhuo Lv, Bing-Li Wu, et al. Neutrophil gelatinase-associated lipocalin and its receptor: independent prognostic factors of oesophageal squamous cell carcinoma. J Clin Pathol 2011;64:69–74. Correspondence for this article should be addressed to: Professor Li-Yan Xu, Institute of Oncologic Pathology, Medical College of Shantou University, No 22, Xinling Road, Shantou 515041, China; liyanxu1130{at}yahoo.com.cn.