Study protocol for a multicentre, randomised, parallel group, sham-controlled clinical trial investigating the effect of transcutaneous vagal nerve stimulation on gastrointestinal symptoms in people with diabetes complicated with diabetic autonomic neuropathy: the DAN-VNS Study
T. Okdahl, D. Bertoli, B. Brock, K. Krogh, Filip Krag Knop, C. Brock, A. Drewes
BMJ Open