Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.|Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, USA.