Transcranial direct current stimulation as treatment for major depression in a home treatment setting (HomeDC trial): study protocol and methodology of a double-blind, placebo-controlled pilot study. - Kumpf, Ulrike; Ezim, Harry; Stadler, Matthias; Burkhardt, Gerrit; Palm, Ulrich; Dechantsreiter, Esther; Padberg, Frank (Pilot & Feasibility Studies, 2023)