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The Public Library of Science (PLoS) is a nonprofit organization of scientists and physicians committed to making the world's scientific and medical literature a public resource. Our goals are to open the doors to the world's library of scientific knowledge by giving any scientist, physician, patient, or student - anywhere in the world - unlimited access to the latest scientific research. The site facilitates research, informed medical practice, and education by making it possible to freely search the full text of every published article to locate specific ideas, methods, experimental results, and observations.