"I began thinking about how illnesses like diabetes, and hypertension, and asthma were treated," McLellan said. "It turns out that they don't have diabetes programs where you go for 28 days and then stop treatment. I think that would be called malpractice. . . . So those treatments try to retain patients in care, use medications, and education, and family training to reduce symptoms, but also to change behavior to deal with the fact that these illnesses will not be cured - only managed."