Immunolocalization of activated transforming growth factor β1 in juvenile nasopharyngeal angiofibroma. - Dillard,D.G.; Cohen,C.; Muller,S.; Del Gaudio,J.; Reichman,O.; Parrish,B.; Rackley,D.; Gal,A.A. (Arch Otolaryngol Head Neck Surg, 2000)