Venous thromboembolic complications (VTE) in children: first analyses of the Canadian registry of VTE - Andrew, M; David, M; Adams, M; Ali, K; Anderson, R; Barnard, D; Bernstein, M; Brisson, L; Cairney, B; DeSai, D; Grant, R; Israels, S; Jardine, L; Luke, B; Massicotte, P; Silva, M (Blood, 1994)