High concordance of 6 HER2 in situ hybridization methods with Abbott FISH J. Boers * , L. Krol, C. Netjes, H. Meeuwissen, C. Prinsen, C. van Krimpen, E. van der Logt, J. Bart, E. Schuuring * Isala Klinieken, Dept. of Pathlogy, Zwolle, Netherlands