The association between the volume of the gallbladder based on sonographic findings and demographical data in the PERSIAN Guilan cohort study (PGCS) oleh Farahnaz Joukar, Mohammad Taghi Ashoobi, Ahmad Alizadeh, Tahereh Zeinali, Niloofar Faraji, Mohammadjavad Tabatabaii, Roya Mansour-Ghanaei, Mohammadreza Naghipour, Fariborz Mansour-Ghanaei