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Research has transformed the face of the medical industry and any new progress in medicines and procedures can all be attributed to it. A critical component of research is a literature review, which involves sourcing scientific articles, research papers, conference proceedings, and much more to support the findings of your paper. Without it, your claims hold no value. Since searching primary resources for information can be inconvenient, many medical search engines have developed online as centralized platforms to look for literature on any medical topic within seconds. Since no one should be expected to go through all of them, the five best ones and suggestions for when you might need to use them are discussed below in detail.