R Vormittag, T Vukovich, C Mannhalter, E Minar, V Schonauer, C Bialonczyk, M Hirschl, and I Pabinger. 2005. “Haptoglobin Phenotype 2-2 As a Potentially New Risk Factor for Spontaneous Venous Thromboembolism”. Haematologica 90 (11). Pavia, Italy, 1557-61. https://doi.org/10.3324/%x.