Toward closed-loop transcutaneous vagus nerve stimulation using peripheral cardiovascular physiological biomarkers: A proof-of-concept study. - Nil Z. Gurel; Md Mobashir Hasan Shandhi; J. Douglas Bremner; Viola Vaccarino; Stacy L. Ladd; Lucy Shallenberger; Amit J. Shah; Omer T. Inan (BSN, 2018)