[1] Nankai Univ, Sch Med, Dept Biochem, Tianjin 300071, Peoples R China
[2] Stanford Univ, MIPS, Canary Ctr Stanford Canc Early Detect, Dept Radiol,Sch Med, Stanford, CA 94305 USA
[3] Stanford Univ, Bio Program 10, Sch Med, Stanford, CA 94305 USA
[4] Purdue Univ, Sch Hlth Sci, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA
[5] Nanjing Med Univ, Nanjing Hosp 1, Dept Nucl Med, Nanjing 210006, Jiangsu, Peoples R China