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nginx/1.14.0 (Ubuntu) A new instrument may soon be pulled out of medical bags during house calls: the mobile-phone camera. According to researchers at University Hospital in Geneva, physicians can now diagnose common ailments such as leg ulcers just as accurately by studying high-resolution cell-phone images as by examining the patient in person. For many elderly patients, the new technique could mean that they will no longer have to leave home for diagnosis and treatment. Nurses could visit patients' homes, and using e-mail or multimedia messaging, send pictures of ulcers back to hospital specialists.

"It has the...