|Hepatology is the branch of medicine that includes the study of liver, gall bladder, pancreases. It was the subject of gastroenterology. It also includes the study of the liver related disease like viral hepatitis. This can be due to the infection with hepatitis b or hepatitis c virus. With help of vaccination this can be prevented. Cirrhosis is one of the major problem related to liver in which liver tissue is replaced by scar tissue.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.