Mettang, Thomas, et al. “Fibroblast Growth-Factor 23 and Calcium-Binding Proteins Are Not Associated With Chronic Itch in Patients on Haemodialysis”. Acta Dermato-Venereologica, vol. 97, no. 3, Oct. 2016, pp. 381-2, doi:10.2340/00015555-2536.