Letter: Evaluation and Surgical Treatment of Functional Neurosurgery Patients With Implanted Deep Brain Stimulation and Vagus Nerve Stimulation Pulse Generators During the COVID-19 Pandemic. Issue 2 (7th May 2020) - Gross, Robert E; Buetefisch, Cathrin M; Miocinovic, Svjetlana; Bullinger, Katie L; Okun, Michael S; Ostrem, Jill L; Foote, Kelly D; Starr, Phillip A