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De Clerck F, Beetens J, de Chaffoy de Courcelles D, Freyne E, Janssen PA.De Clerck F, et al.Thromb Haemost. 1989 Feb 28;61(1):35-42.Thromb Haemost. 1989.PMID: 2546278
De Clerck F, Beetens J, Van de Water A, Vercammen E, Janssen PA.De Clerck F, et al.Thromb Haemost. 1989 Feb 28;61(1):43-9.Thromb Haemost. 1989.PMID: 2526385