Noninvasive Vagus Nerve Stimulation in a Primary Care Setting: Effects on Quality of Life and Utilization Measures in Multimorbidity Patients With or Without Primary HeadacheByIain Strickland, PhD, BSc,Mkaya Mwamburi, MD, PhD,Steven Davis BSc,James C.R. Ward, MBBS,Janet Day, MBChB,Andrew T. Tenaglia, BA,Eric J. Leibler,Peter S. Staats, MD, MBADecember 13th 2018