Helicobacter pylori infection may improve the survival of patients with carcinomas.

Mohammadali M. Shoja Tuberculosis and Lung Disease Research Center, Tabriz Medical University, Postal code: 51738-47661, Amir Kabir Avenue, Kar Pisheh Crossing, Tabriz, Iran Tel.: +98 411 4443502; fax: +98 411 4438523 E-mail address: shoja.m@gmail.com R. Shane Tubbs Department of Cell Biology, Section of Pediatric Neurosurgery, University of Alabama and Children’s Hospital Birmingham, Alabama, USA