Risk factors of choledocholithiasis recurrence in elderly patients with acute cholangitis after ERCP surgery 
FENG Qizhu, CHEN Xianzhi, SUN Jie, ZHANG Jian, WANG Qi.
The Journal of Practical Medicine . 2023, (15): 1945 -1949 .  DOI: 10.3969/j.issn.1006-5725.2023.15.015