[1] N Sichuan Med Coll, Dept Anat, Nanchong 637007, Peoples R China
[2] N Sichuan Med Coll, Morphometr Res Lab, Nanchong 637007, Peoples R China
[3] N Sichuan Med Coll, Dept Gen Surg, Affiliated Hosp, Nanchong 637007, Peoples R China
[4] N Sichuan Med Coll, Inst Immunol & Mol Biol, Nanchong 637007, Peoples R China
[5] N Sichuan Med Coll, Sichuan Key Lab Med Imaging, Nanchong 637007, Peoples R China