ARS-1620 and BI-3406 was purchased from MedChemExpress. AMG-510, Erlotinib, Afatinib, AZD-4547, Linsitinib, Imatinib, Cabozantinib, Ceritinib, GDC-0941 and RXDX-106 were purchased from Selleckchem. Drugs were reconstituted in DMSO to 10 mM stock concentrations and stored at −80oC. The combination index (CI) was calculated using CompuSyn software (20 (link)). The coefficient of drug interaction (CDI) was calculated using the following formula; CDI = AB/(A × B) (21 (link)).