Letter on 'European dermatology forum S1‐guideline on the diagnosis and treatment of sclerosing diseases of the skin, Part 2: Scleromyxedema, scleredema and nephrogenic systemic fibrosis'. (23rd January 2018) - Mark, P.B.; Dekkers, I.; Blankestijn, P.J.; Leiner, T.; Roditi, G.