Fibrinogen substitution improves whole blood clot firmness after dilution with hydroxyethyl starch in bleeding patients undergoing radical cystectomy: a randomized, placebo-controlled clinical trial. - Fenger-Eriksen,C.; Jensen,TM.; Kristensen,BS.; Jensen,KM.; Tonnesen,E.; Ingerslev,J.; Sorensen,B.. (J Thromb Haemost, 2009)