Bingham KS, Neufeld NH, Alexopoulos GS, Marino P, Mulsant BH, Rothschild AJ, Voineskos AN, Whyte EM, Meyers BS, Flint AJ. Factor analysis of the CORE measure of psychomotor disturbance in psychotic depression: Findings from the STOP-PD II study. Psychiatry Res. 2022 08; 314:114648.