The aim of this study was to evaluate knowledge and behavior of physicians regarding Hepatitis B Virus. The investigators designed a 30-item self-administered questionnaire assessing physicians' knowledge and behavior regarding chronic Hepatitis B Virus infection. These results provide data support for updating guidelines, continuing training, and even developing policies in medical insurance.

Schedule of the study:

Before March 1, 2015: study design, completing questionnaire design, and all preparatory work; Before July 1, 2015: a kick-off meeting for plot study, modifying the questionnaire, and obtaining all the questionnaires; Before September 30, 2015: finishing data entry, statistical analysis, drafting the report, and issued a final report

Inclusion Criteria:

1. Mainly engaged in liver disease diagnosis and treatment;
2. Diagnosis and treatment at least 10 patients with chronic Hepatitis B Virus infection per week.

Exclusion Criteria:

1. young doctors working in less than one year;
2. physicians working in hospital of Traditional Chinese Medicine
3. visiting doctors.

physicians fullfill the following criterion:

1. Mainly engaged in liver disease diagnosis and treatment;
2. Diagnosis and treatment at least 10 patients with chronic Hepatitis B Virus infection per week.