Benchikhi, H, JC Roujeau, M Levent, M Gouault-Heilmann, J Revuz, and A. Cosnes. 1998. “Chilblains and Raynaud Phenomenon Are Usually Not a Sign of Hereditary Protein C and S Deficiencies”. Acta Dermato-Venereologica 78 (5):351-52. https://doi.org/10.1080/000155598443033.