Fig. 5From: Repeated bronchoscopy in health and obstructive lung disease: is the airway microbiome stable?Bray–Curtis distances between first and second procedure in four sampling modalities (paired, within individuals). Stratified by whether subjects received antibiotics between the two procedures. PBAL1: first fraction of protected broncho-alveolar lavage. PBAL2: second fraction of protected broncho-alveolar lavage. rPSB: protected specimen brush from right lower lobeBack to article page