Pourshams Akram, Khademi Hooman, Malekshah Akbar Fazeltabar, Islami Farhad, Nouraei Mehdi, Sadjadi Ali Reza, Jafari Elham, Rakhshani Nasser, Salahi Rasool, Semnani Shahryar, Kamangar Farin, Abnet Christian C, Ponder Bruce, Day Nick, Dawsey Sanford M, Boffetta Paolo, Malekzadeh Reza
Digestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Int J Epidemiol. 2010 Feb;39(1):52-9. doi: 10.1093/ije/dyp161. Epub 2009 Mar 30.