The 3‐phenylcoumarin derivative 6,7‐dihydroxy‐3‐[3′,4′‐methylenedioxyphenyl]‐coumarin downmodulates the Fc&ggr;R‐ and CR‐mediated oxidative metabolism and elastase release in human neutrophils: Possible mechanisms underlying inhibition of the formation and release of neutrophil extracellular traps