*James Homer Wright Pathology Laboratories, Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA

Departments of †Surgery

§Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center

‡Department of Pathology, New York University, Langone Medical Center, New York, NY

Conflicts of Interest and Source of Funding: B.W. reports research funding from Repare Therapeutics, outside the scope of this study. For the remaining authors none were declared.

Correspondence: Baris Boyraz, MD, PhD, Department of Pathology, Massachusetts General Hospital, 55 Fruit Street, Warren Building, Boston, MA 02114 (e-mail: [email protected]).