THISTLE: trial of hands-on Interprofessional simulation training for local emergencies: a research protocol for a stepped-wedge clustered randomised controlled trial oleh Erik Lenguerrand, Catherine Winter, Karen Innes, Graeme MacLennan, Dimitrios Siassakos, Pauline Lynch, Alan Cameron, Joanna Crofts, Alison McDonald, Kirsty McCormack, Mark Forrest, John Norrie, Siladitya Bhattacharya, Tim Draycott, On behalf of the Thistle group