nejm.org  Alternative

nih.gov

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official website of the national institutes of health (nih). nih is one of the world's foremost medical research centers. an agency of the u.s. department of health and human services, the nih is the federal focal point for health and medical research. the nih website offers health information for the public, scientists, researchers, medical professionals, patients, educators,

cdc.gov

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as the nation’s health protection agency, cdc saves lives and protects people from health, safety, and security threats.

sciencedirect.com

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sciencedirect is the world

harvard.edu

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harvard university is devoted to excellence in teaching, learning, and research, and to developing leaders who make a difference globally.

springer.com

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springer - our business is publishing. throughout the world, we provide scientific and professional communities with superior specialist information;

nature.com

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first published in 1869, nature is the world’s leading multidisciplinary science journal. nature publishes the finest peer-reviewed research that drives ground-breaking discovery, and is read by thought-leaders and decision-makers around the world.

mayoclinic.org

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seamless care that revolves around you: more than 4,700 physicians and scientists collaborate across mayo clinic campuses in arizona, florida and minnesota. u.s. news & world report ranks mayo clinic as the #1 hospital overall and #1 in more specialties than any other hospital in the nation.

tandfonline.com

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Search and explore the millions of quality, peer-reviewed journal articles published under the taylor & francis and routledge imprints.