Are you going to conduct a systematic review and need help with the literature search? Do you want to make sure that you have not missed relevant articles in your topic?
The purpose with a systematic review is to sum up all available and relevant research on a specific question. A crucial part is an extensive literature search, transparently reported in detail in the final publication. The search strategies should be formulated to find all relevant literature and be as comprehensive as possible, in order to avoid publication bias.
The searches are always performed in a number of databases, with search strategies aiming at high sensitivity, and with in advance determined criteria for selection. There are several acknowledged international standards, for example PRISMA and Cochrane Handbook .