Gut Bifidobacterium responses to probiotic Lactobacillus casei Zhang administration vary between subjects from different geographic regions. - Zhao, Feiyan; Bai, Xiaoye; Zhang, Juntao; Kwok, Lai-Yu; Shen, Lingling; Jin, Hao; Sun, Tiansong; Sun, Zhihong; Zhang, Heping (Applied Microbiology & Biotechnology, 2022)