What are the optimal transcranial direct current stimulation parameters and design elements to modulate corticospinal excitability? A systematic review and longitudinal meta-analysis. - Tapsell LC; Pinto MD; Vallence AM; Whife C; Perez Armendariz ML; Senger S; Andringa-Bate J; Hince D; Murphy MC (Neurological research and practice, 2025)