S100A7 and systemic sclerosis: Therefore the aims of this study were: (1) to determine salivary psoriasin concentrations by a specific ELISA kit; (2) to define the distribution characteristics of salivary psoriasin levels in SSc patient and healthy subject populations by SPSS statistic analysis; (3) to confirm the correlation of the presence of salivary psoriasin with pulmonary involvement in the SSc population.