Cockayne, S, Fairhurst, C, Zand, M, Frost, G, Liddle, M, Cunningham-Burley, R, Hewitt, C, Iles-Smith, HM, Green, L, Bain, E, Mogradia, M, Torgerson, DJ, "Slip-resistant footwear to reduce slips among health-care workers : the SSHeW RCT", Public Health Research, 2021