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Koller M, Schoch U, Buchmann P, Largiadèr F, von Felten A, Frick PG.Koller M, et al. Among authors: frick pg.Thromb Haemost. 1986 Dec 15;56(3):243-6.Thromb Haemost. 1986.PMID: 3551180Clinical Trial.
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Neftel KA, Woodtly W, Schmid M, Frick PG, Fehr J.Neftel KA, et al. Among authors: frick pg.Br Med J (Clin Res Ed). 1986 Mar 15;292(6522):721-3. doi: 10.1136/bmj.292.6522.721.Br Med J (Clin Res Ed). 1986.PMID: 3082410Free PMC article.