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Do you know how much REM sleep you got last night? New types of devices that monitor activity, sleep, diet, and even mood could make us healthier and more productive.
New wireless devices and smart phones apps let you track every facet of your physical and mental health.
A new app gets data from an implanted device and can share it with the patient, doctors, and family.
Mobile-phone activity can provide a warning of disease flare-ups.