Diagnosis by text or a phone call is often convenient and popular with patients. But is it good medicine? Apriori/iStockphoto hide caption

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UnitedHealthcare says it will cover doctors' visits by live video on smartphones, tablets and computers. Doctor On Demand hide caption

itoggle caption Doctor On Demand

Science-based guidelines say there's no benefit to getting an EKG of heart activity before routine cataract surgery — even if the patient is old. But most doctors order such tests anyway. Bull's Eye/ImageZoo/Corbis hide caption

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Dr. Raj Mangrulkar and medical student Jesse Burk-Rafel at the University of Michigan Medical School. Good communication skills, teamwork and adaptability will help doctors thrive through swift changes in medical science, Mangrulkar says. Leisa Thompson/Courtesy of University of Michigan Medical School hide caption

itoggle caption Leisa Thompson/Courtesy of University of Michigan Medical School

Benjamin Rush, a physician and one of the signers of the Declaration of Independence, invented the rotational chair as a treatment for psychotic patients. He believed the chair helped improve circulation to the mentally ill brain. U.S. National Library of Medicine/Courtesy of Little Brown and Company hide caption

itoggle caption U.S. National Library of Medicine/Courtesy of Little Brown and Company

U.S. taxpayers have poured $30 billion into funding electronic records systems in hospitals and doctors' offices since 2009. But most of those systems still can't talk to each other, which makes transfer of medical information tough. iStockphoto hide caption

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Dr. Kwan Kew Lai volunteered for six weeks at an Ebola treatment center run by International Medical Corps in Bong, Liberia. Courtesy of Kwan Kew Lai hide caption

itoggle caption Courtesy of Kwan Kew Lai