Hepatology Department, Qilu Hospital of Shandong University, Ji′nan 250012, China;
Department of Nursing, Qilu Hospital of Shandong University, Ji′nan 250012, China;
Hepatology Department, Qilu Hospital of Shandong University, Ji′nan 250012, China;
Department of Respiration, Qilu Hospital of Shandong University, Ji′nan 250012, China;
Hepatology Department, Qilu Hospital of Shandong University, Ji′nan 250012, China;
Department of Nursing, Qilu Hospital of Shandong University, Ji′nan 250012, China;