Integrated Intensive Care Unit;
The First Affiliated Hospital of Zhengzhou University;
Zhengzhou 450052;
Henan Province;
China;
Health Management Centre;
The Affiliated Hospital of Qingdao University;
Qingdao 266000;
Shandong Province;
China;
Department of Emergency Medicine;
The Affiliated Hospital of Qingdao University;
Qingdao 266000;
Shandong Province;
China;
Acute pancreatitis; Probiotics; Length of hospitalization; Randomized study; Placebo; Mild;