title: Pharmacological study of tracheal smooth muscle in neonatal swine.
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D005260:Female; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects*; D013552:Swine; D014132:Trachea / Q000187:drug effects