Sander B, de Jong D, Rosenwald A, Xie W, Balagué O, Calaminici M, Carreras J, Gaulard P, Gribben J, Hagenbeek A, Kersten MJ, Molina TJ, Lee A, Montes-Moreno S, Ott G, Raemaekers J, Salles G, Sehn L, Thorns C, Wahlin BE, Gascoyne RD, Weller E. The reliability of immunohistochemical analysis of the tumor microenvironment in follicular lymphoma: a validation study from the Lunenburg Lymphoma Biomarker Consortium. Haematologica 2014; 99(4):715-725; https://doi.org/10.3324/haematol.2013.095257.