The Feedback Intervention Trial (FIT)--improving hand-hygiene compliance in UK healthcare workers: a stepped wedge cluster randomised controlled trial. oleh Christopher Fuller, Susan Michie, Joanne Savage, John McAteer, Sarah Besser, Andre Charlett, Andrew Hayward, Barry D Cookson, Ben S Cooper, Georgia Duckworth, Annette Jeanes, Jenny Roberts, Louise Teare, Sheldon Stone