Journal Article CONTACT DERMATITIS VIII Get access Niels Hjorth, Niels Hjorth Finsen Institute, Copenhagen Search for other works by this author on: Oxford Academic Google Scholar D. S. Wilkinson D. S. Wilkinson Amersham, Buckinghamshire Search for other works by this author on: Oxford Academic Google Scholar British Journal of Dermatology, Volume 81, Issue 10, 1 October 1969, Pages 796–798, https://doi.org/10.1111/j.1365-2133.1969.tb15945.x Published: 01 October 1969
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Hjorth et al. (1969) studied this question.