The "round the houses" sign and "zig-zag" sign in progressive supranuclear palsy and other conditions. - Fearon C; Field R; Donlon E; Murphy OC; Cronin S; Buckley C; Williams L; Llamas Y; O'Dowd S; O'Sullivan SS; Gold DR; Walsh R; et al. (Parkinsonism & related disorders, 2020)