SKOV3ip1 and HeyA8 cells were provided by Dr. Gordon Mills (M.D. Anderson Cancer Center, Houston, TX). HeyA8-MDR was a gift from Dr. Anil Sood (M.D. Anderson Cancer Center, Houston, TX) (30 (link)). SKOV3-Taxol resistant cells (TR) were provided by Dr. Zhenfeng Duan (MGH, Boston MA) (31 (link)). Tyk-nu cells were provided by Dr. Kenjiro Sawada (Osaka University, Japan) (32 (link)). The Tyk-nu carboplatin-resistant (R) cell line (33 (link)) was purchased from JCRB cell bank. Tyk-nu and Tyn-nu-R cells were cultured in Eagle’s Minimum Essential Medium with 15% fetal bovine serum, 1% penicillin–streptomycin and 1% L-glutamine (34 (link)). All other human OvCa cell lines were maintained in Dulbecco’s modified Eagle’s medium with 10% FBS and 1% penicillin-streptomycin solution at 37°C with 5% CO2. All cell lines were authenticated using the commercial service, CellCheck (IDEXX Bioresearch). Samples were confirmed to be of human origin and no mammalian inter-species contamination was detected. The alleles for 9 short tandem repeat (STR) markers were determined and the results were compared to the profiles from DSMZ, ATCC, JCRB, and RIKEN STR databases.