[1] Nanjing Univ Chinese Med, Grad Sch, Nanjing 210029, Peoples R China
[2] Nanjing Med Univ, Dept Pathogen Biol, Key Lab Pathogen Jiangsu Prov, Nanjing 211166, Peoples R China
[3] Southeast Univ, Zhongda Hosp, Dept Anorectal Surg, Nanjing 210009, Peoples R China
[4] Nanjing Univ Chinese Med, Nanjing Hosp Chinese Med, Colorectal Dis Ctr, Nanjing 210022, Peoples R China