TY - CHAP U1 - Konferenzveröffentlichung A1 - Egert, Markus T1 - Rethinking the definition of hygiene? - Mutual interactions between the human microbiome and the built environment microbiome T2 - 10th International Conference on Skin Ageing & Challenges, February 25 - 27, 2019, Porto, Portugal Y1 - 2019 ER -