The prevalence of peptic ulcer not related to Helicobacter pylori or non steroidal anti inflammatory drug use is negligible in southern Europe.

Arroyo MT, Forne M, de Argila CM, Feu F, Arenas J, de la Vega J, Garrigues V, Mora F, Castro M, Bujanda L, Cosme A, Castiella A, Gisbert JP, Hervas A, Lanas A
Helicobacter 2004;9:249-54