General discussion Por Freed, K, Polanyi, J, Koplitz, B, Xu, Z, Baugh, D, Wittig, C, Brouard, M, Docker, M, Simons, J, Hodgson, A, Dunne, L, Murrell, J, Welge, K, Ashfold, M, Dixon, R, Shapiro, M, Schinke, R, Engel, V, Hutson, J, Halpern, J, Williams, C, Pfab, J, McCoustra, MRS, Child, MS, Moore, C