Cockayne, S, Hewitt, C, Hicks, K, Jayakody, S, Kang'ombe, A.R, Stamuli, E, Turner, G, Thomas, K, Curran, M, Denby, G, Hashmi, F, McIntosh, C, McLarnon, N, Torgerson, D, Watt, I, "Cryotherapy versus salicylic acid for the treatment of plantar warts (verrucae): a randomised controlled trial", British Medical Journal (BMJ), 2011