High-definition transcranial direct current stimulation for depressive and other non-motor symptoms in Parkinson's disease: a randomised, sham-controlled, cross-over study. - Sharma P; Singh SM; Mehta S; Ghosh A; Kumar K (East Asian archives of psychiatry : official journal of the Hong Kong College of Psychiatrists = Dong Ya jing shen ke xue zhi : Xianggang jing shen ke yi xue yuan qi kan, 2026)