Reiko Kurotani Satoshi Okumura Tsutomu Matsubara Utako Yokoyama John R. Buckley Takeshi Tomita Kyohei Kezuka Tomokazu Nagano Dominic Esposito Troy E. Taylor William K. Gillette Yoshihiro Ishikawa Hiroyuki Abe Jerrold M. Ward Shioko Kimura

Cláudia Savassi Guimaraes Natalie Moulton-Levy Allen Sapadin Claudia Vidal

alireza rostami cardiac surgeon, cardiac surgery department, amir-almomenin hospital, faculty of medicine, arak university of medical sciences, arak, iran mehrzad sharifi cardiologist, cardiac surgery department, amir-almomenin hospital, faculty of medicine, arak university of medical sciences, arak, iran masoumeh kalantari general physician, arak university of medical sciences, arak, iran yazdan ghandi pediatric heart specialist, amirkabir hospital, arak university of medical sciences, arak, iran

iranian center for disease control iranian center for disease control.

mohammad rostami-nejad department of celiac disease, gastroenterology and liver diseases research center, shahid beheshti university of medical sciences, tehran, ir iran thea haldane department of gastroenterology, alexandra hospital, worcestershire, uk david aldulaimi department of gastroenterology, alexandra hospital, worcestershire, uk seyed moayed alavian baqiyatallah research center for gastroenterology and liver disease, baqiyatallah university of medical sciences, tehran, ir iran; middle east liver disease center, tehran, ir iran mohammad reza zali department of celiac disease, gastroenterology and liver diseases research center, shahid beheshti university of medical sciences, tehran, ir iran kamran rostami department of gastroenterology, darent valley hospital, darenth wood road, dartford, uk; department of gastroenterology, darent valley hospital, darenth wood road, dartford, kent, da2 8da, uk. tel: +44-845127012700, fax: +44-845127012701, email: [email protected]