I. To collect tumor tissue from pretreatment biopsies (archival samples) for biomarker studies, including poly (ADP-ribose) polymerase 1 (PARP) activity by measuring the levels of poly-ADP-ribose, gamma-H2A histone family, member X (gamma-H2AX), and messenger ribonucleic acid (mRNA) expression levels of deoxyribonucleic acid (DNA) repair enzymes such as excision repair cross-complementing rodent repair deficiency, complementation group 1 (ERCC1)/x-ray repair complementing defective repair in Chinese hamster cells 1 (XRCC1).