is specified output of is_specified_output_of derives from specimen collection process lower respiratory tract specimen endotracheal tube specimen John Judkins ORCID:0000-0001-6595-0902 https://bmcpulmmed.biomedcentral.com/articles/10.1186/s12890-019-0926-3 endotracheal tube specimen A specimen that derives from a biofilm that forms on the inner surface of an endotracheal tube while the tube is in the trachea. The specimen is collected upon removal of the tube from the trachea. collecting specimen from organism respiratory system fluid/secretion metadata complete