iPhone app could guide MS research, treatment. Duke Today, Oct. 3, 2017. For some diseases, a simple blood test is all that’s needed to gauge severity or confirm a diagnosis. Not so for multiple sclerosis. No single lab test can tell doctors what type of MS a patient has, nor whether it’s responding to treatment. By better tracking patients with help from a new iPhone app, researchers hope to take some of the guesswork out of treating MS and pave the way to more personalized care. Picked up by the News & Observer and the Herald-Sun.