We thank Dr Bob Scholte, Erasmus Medical Center Rotterdam, The Netherlands, who provided Cftrtm1EUR (F508del (FVB/129) mice (European Economic Community European Coordination Action for Research in Cystic Fibrosis program EU FP6 SHM-CT-2005-018932), Dr Beth Levine, Center for Autophagy Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, USA, and Dr Francesco Cecconi, University of Tor Vergata, Rome, Italy, who provided C57BL/6J background Becn1+/–mice, Dr EM Bruscia, Yale University School of Medicine, who provided GFP-labelled P. aeruginosa. The gene discussed is BECN1; the disease is cystic fibrosis.