Unusually large plasma factor VIII: von Willebrand factor multimers in chronic relapsing thrombotic thrombocytopenic purpura - Moake, J L; Rudi, C K; Troll, J N; Weinstein, M J; Colannino, N M; Azocar, J; Seder, R H; Hong, S L; Deykin, D (N Engl J Med, 1982)