Department;
of;
Gastroenterology,;
The;
Second;
Affiliated;
Hospital,;
Sun;
Yat-sen;
University,;
Guangzhou;
510120,;
China;
Department;
of;
Nosocomiology,;
The;
Second;
Affiliated;
Hospital,;
Sun;
Yat-sen;
University,;
Guangzhou;
510120,;
China;
Department;
of;
Pharmacy,;
The;
Second;
Affiliated;
Hospital,;
Sun;
Yat-sen;
University,;
Guangzhou;
510120,;
China;