Reinauer, S, et al. “Helicobacter Pylori in Patients With Systemic Sclerosis: Detection With the 13C-Urea Breath Test and Eradication”. Acta Dermato-Venereologica, vol. 74, no. 5, Sept. 1994, pp. 361-3, doi:10.2340/0001555574364367.