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