[1] Yidu Cent Hosp Weifang, Clin Lab, Weifang 262500, Peoples R China
[2] Jiangsu Simcere Diagnost Co Ltd, State Key Lab Neurol & Oncol Drug Dev, Nanjing 210042, Peoples R China
[3] Nanjing Simcere Med Lab Sci Co Ltd, Dept Med, Nanjing 210042, Peoples R China
[4] Yale Univ, Yale Sch Publ Hlth, Dept Biostat, New Haven, CT 06520 USA
[5] Jinzhou Med Univ, Affiliated Hosp 1, Canc Ctr, Jinzhou 121001, Peoples R China
[6] Linyi Peoples Hosp, Dept Thorac Surg, Linyi 276000, Peoples R China