Journal article (2008) - S.J. Howe (author), M.R. Mansour (author), K.C. Gilmour (author), S Adams (author), SI Thornhill (author), KL Parsley (author), FJT Staal (author), RE Gale (author), DC Linch (author), J Bayford (author), L Brown (author), M Quaye (author), K. Schwarzwaelder (author), C Kinnon (author), P Ancliff (author), DK Webb (author), M Schmidt (author), C von Kalle (author), H.B. Gaspar (author), A.J. Trasher (author), C. Bartholomae (author), M. Hubank (author), H. Kempski (author), MH Brugman (author), K Pike-Overzet (author), S.J. Chatters (author), Dick de Ridder (author), D. de Ridder (author)