Immunohistochemical study of stromal and vascular components of tonsillar polyps: high endothelial venules as participants of the polyp’s lymphoid tissue - Barreto, Icléia; Costa, Ana Flávia; Martins, Marília Trierveiler; Furuse, Cristiane; Araújo, Vera Cavalcanti de; Altemani, Albina (Virchows Archiv, 2011)