The Sedative and Haemodynamic effects Of Continuous Ketamine infusions on Intensive Care Unit patients (SHOCK-ICU): Investigating key outcomes, resource utilisation and staff decision-making: Clinical feasibility study protocol. - Richards ND; Howell SJ; Bellamy MC; Beck J; Tingerides F; Mujica-Mota R; Bekker HL; Relton S; Thorp H (Journal of the Intensive Care Society, 2025)