Cross-sectional analysis of the microbiota of human gut and its direct environment in a household cohort with high background of antibiotic use by Vu Thi Ngoc, B, Ho Bich, H, Galazzo, G, Vu Tien Viet, D, Oomen, M, Nghiem Nguyen Minh, T, Tran Huy, H, van Doorn, HR, Wertheim, HFL, Penders, J