Immunohistochemical analysis of PTEN in endometrial carcinoma: a tissue microarray study with a comparison of four commercial antibodies in correlation with molecular abnormalities - Judit Pallarés; Elena Bussaglia; José‐Luis Martínez‐Guitarte; Xavier Dolcet; David Llobet‐Navàs; Montserrat Rué; L Sánchez‐Verde; José Palacios; Jaime Prat; Xavier Matías‐Guiu (2004)