Tremor reduction using a multi-focus transcranial ultrasound stimulation system targeting thalamus: Preliminary results - Zelma Kiss; Ana Arantes; Janet Adeoti; Alan Coreas; Nishaad Sheth; Catherine Swytink-Binnema; Shirshak Shrestha; Davide Martino; Samuel Pichardo; G. Bruce Pike (Brain Stimulation)