A. Oxholm, P. Oxholm, C. Avnstorp, and K. Bendtzen, “Keratinocyte-expression of interleukin-6 but not of tumour necrosis factor-alpha is increased in the allergic and the irritant patch test reaction”., Acta Derm Venereol, vol. 71, no. 2, pp. 93–98, Jan. 1991.