- Cytokine and chemokine levels in systemic sclerosis: relationship with cutaneous and internal organ involvement. Scala, E., Pallotta, S., Frezzolini, A., Abeni, D., Barbieri, C., Sampogna, F., De Pità, O., Puddu, P., Paganelli, R., Russo, G. Clin. Exp. Immunol. (2004)