PFS in patients stratified by FCGR2A genotype. (A) FC treated patients stratified by FCGR2A genotype. (B) R-FC treated patients stratified by FCGR2A genotype. (C) FC treated patients stratified by FCGR2A genotypes HR/RR vs HH. (D) R-FC treated patients stratified by FCGR2A genotypes HR/RR vs HH.