List of Articles Bifidobacterium longum Open Access Article Abstract Page Full-Text 1 - Population frequency of Bifidobacterium longum and Bifidobacterium bifidum in the intestine of obese patients before and after gastric surgery Kimia Golestanfar Laya Takbiri Osgoei Elham Siasi Torbati Hossein Khodabandeh shahraki