Statistical analysis plan (SAP) for A Very Early Rehabilitation Trial (AVERT): an international trial to determine the efficacy and safety of commencing out of bed standing and walking training (very early mobilization) within 24 h of stroke onset vs. usual stroke unit care. Issue 1 (January 2015) - Bernhardt, Julie; Churilov, Leonid; Dewey, Helen; Lindley, Richard I.; Moodie, Marj; Collier, Janice; Langhorne, Peter; Thrift, Amanda G.; Donnan, Geoffrey; AVERT Collaborators