163P Genomic alterations in circulating tumor DNA (ctDNA) and response to ABBV-400 treatment in patients with advanced solid tumors. - Bar, J.; Sharma, M.R.; Kuboki, Y.; Perets, R.; Sommerhalder, D.; Yamamoto, N.; Powderly, J.; Strickler, J.H.; Li, M.; Luo, A.; Morrison-Thiele, G.; Neagu Aristide, M.R.; et al. (Annals of Oncology, 2023)