Al-Tawil, NG, G Berggren, L Emtestam, J Fransson, R Jernselius, and JA. Marcusson. 1985. “Correlation Between Quantitative in Vivo and in Vitro Responses in Nickel-Allergic Patients”. Acta Dermato-Venereologica 65 (5):385-89. https://doi.org/10.2340/0001555565385389.