A	ATR inhibitor (ceralasertib)
ABC	ATP-binding cassette
ATCC	American Type Culture Collection
ATR	ataxia telangiectasia and RAD3-related protein
ATRi	ATR inhibitor(s)
BRCA1	breast cancer type 1 susceptibility protein
BRCA2	breast cancer type 2 susceptibility protein
BrdU	bromodeoxyuridine
C	CHK1 inhibitor (MK-8776)
CDI	coefficient of drug interaction
CHK1	checkpoint kinase 1
CHK1i	CHK1 inhibitor(s)
DDR	DNA damage response
DSB	double-strand break
ECACC	The European Collection of Authenticated Cell Cultures
HGSOC	high-grade serous ovarian cancer
HI-FBS	heat-inactivated fetal bovine serum
IC50	concentration of drug required to reduce cell viability to 50%
MDR	multidrug resistance
MDR1	multidrug resistance protein 1
MDRi	multidrug resistance inhibitor(s)
MFI	geometric mean fluorescence intensity
NGS	next-generation sequencing
NHEJ	non-homologous end joining
O	olaparib
OC	ovarian cancer
ORF	open reading frame
PARG	poly(ADP-ribose) glycohydrolase
PARP1	poly(ADP-ribose) polymerase 1
PARPi	PARP inhibitor(s)
PDT	population doubling time
PEO1-OR	PEO1 olaparib-resistant cell line
QCI-IT	Qiagen Clinical Insight Interpret Translational
SF	surviving fraction
Tar	tariquidar
WES	whole-exome sequencing