Human neutrophils were isolated from the venous blood of healthy donors as described previously (Uriarte et al., 2011 ). In some experiments, further purification by negative magnetic selection was performed using the Easy Eights EasySep Magnet and human neutrophil enrichment kit (Stemcell Technologies, Vancouver, BC, Canada) (Miralda et al., 2020 (link); Vashishta et al., 2019 ).