intubation, stenosis, compression, deviation, obstruction, suctioning, tube, suction, cartilage, aspiration, epithelium, injury, pressure, system, resection, extubation, gills, wall, mucosa, opening, cells, muscle, collapse, tug, damage, tubes, wound, reconstruction, cultures, bifurcation, aspirate, velocity, bronchus, insufflation, narrowing, fluid, lumen, shift, rings, tissue, dilator, trauma, tugging, placement, trunk, flow, respiration, displacement, fistula, occlusion, rupture, surgery, tumors, irritation, involvement, toilet, instillation, glands, stoma, agenesis, secretion, anastomosis, culture, cannula, tone, tumor, end, invasion, cytotoxin, sounds, gill, membrane, ventilation, erosion, secretions, ring, colonization, necrosis, branches, spiracle, perforation, edema, air, groove, column, transport, dilatation, stricture, diameter, size, atresia, lesions, diphtheria, shadow, sound, lavage

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