DCN and systemic sclerosis: In 2000, Morita et al. could confirm the UVA1-induced softening of sclerosis following partial body 60 J/cm2 medium-dose UVA1 phototherapy ranging from 510 to 1740 J/cm2 cumulative dose in three patients with diffuse and one with limited SSc, later further underlined by decreased dermal decorin levels as published in 2003 [29,30].