title: Preface.
authors.affiliation: Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030-4009, USA. lma4@mdanderson.org.
authors.forename: Li
authors.initials: L
authors.lastname: Ma
mesh_terms: D000818:Animals; D001943:Breast Neoplasms / Q000473:pathology*; D005260:Female; D064593:Heterografts; D006801:Humans; D009362:Neoplasm Metastasis; D059016:Tumor Microenvironment