PIV: Placement, Pattern, and Personalization of an Inconspicuous Vibrotactile Breathing Pacer. - Pardis Miri; Robert Flory; Andero Uusberg; Heather Culbertson; Richard H. Harvey; Agata Kelman; Davis Erik Peper; James J. Gross; Katherine Isbister; Keith Marzullo (ACM Trans. Comput. Hum. Interact., 2020)