Understanding the physiology of pre-fertilisation events in the human spermatozoa--a necessary prerequisite to developing rational therapy. by Conner, S, Lefièvre, L, Kirkman-Brown, J, Michelangeli, F, Jimenez-Gonzalez, C, Machado-Oliveira, G, Pixton, K, Brewis, I, Barratt, C, Publicover, S