|Depression is considered as mood state that goes beyond temporarily feeling weather it is sad or happiness. it is simply feeling unhappy or fed up for a few days. It is a life-long condition in which the time interval of wellness alternate with the occurrence of illness. It is a serious illness that majorly affects one's thought, feelings, behavior, mood and physical health. Major depression is also known as clinical depression. The availability of the effective treatment and better understanding lessen the depression to a certain extent level.
Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.