Walking back to the hospital, she says the patient has classic symptoms of cholera.

NPR: Congo Violence Creates Medical Crisis

King says the knee is learning in real time to react to a patient so the patient doesn't have to think about walking.

CNN: Iraq veteran gets powerful new knees

The first patient, who had been diagnosed with the disease about eight years before she started Gammagard, had trouble walking and talking.

WSJ: Immune-Disorder Drug Shows Promise for Alzheimer's

Fixing the number of days that a patient should stay in hospital after a hip replacement discourages the development of techniques to get him up and walking sooner.

ECONOMIST: Patients or profits?