Harangi, F., et al. “Comparing the Epidemiological, Immunological and Clinical Features of Extrinsic and Intrinsic-Type Atopic Dermatitis”. European Journal of Pediatric Dermatology, vol. 17, no. 2, June 2007, pp. 103-7, https://ejpd.migration.pkpps03.publicknowledgeproject.org/index.php/journal/article/view/442.