1 Department of Neurology, University of Wisconsin-Madison, School of Medicine and Public Health, 1685 Highland Avenue, Madison, WI 53705-2281, USA. Electronic address: jspaulsen@wisc.edu.
2 Department of Psychiatry, University of Iowa Hospitals and Clinics, University of Iowa Healthcare, 200 Hawkins Drive, Iowa City, IA 52242, USA. Electronic address: carissa-nehl@uiowa.edu.