The factorial structure of the Suicide Intent Scale: a comparative study in clinical samples from 11 European regions. by Antretter, E, Dunkel, D, Haring, C, Corcoran, P, De Leo, D, Fekete, S, Hawton, K, Kerkhof, A, Lönnqvist, J, Renberg, E, Schmidtke, A, Van Heeringen, K, Wasserman, D