Benchikhi, H., Roujeau, J., Levent, M., Gouault-Heilmann, M., Revuz, J., & Cosnes, A. (1998). Chilblains and Raynaud Phenomenon are Usually Not a Sign of Hereditary Protein C and S Deficiencies. Acta Dermato-Venereologica, 78(5), 351–352. https://doi.org/10.1080/000155598443033