P. van de Kerkhof, H. Rulo, J. van Pelt, I. van Vlijmen-Willems, and E. De Jong, “Expression of Endoglin in the Transition Between Psoriatic Uninvolved and Involved Skin”., Acta Derm Venereol, vol. 78, no. 1, pp. 19–21, Mar. 1998.