Oral administration of rutile and anatase TiO 2 nanoparticles shifts mouse gut microbiota structure - Li, Juan; Yang, Shengmei; Lei, Runhong; Gu, Weihong; Qin, Yanxia; Ma, Sihan; Chen, Kui; Chang, Yanan; Bai, Xue; Xia, Shibo (Nanoscale, 2018)