School of Medicine for polyclonal anti-CFTR antibody, R. J. Bridges (Rosalind Franklin University of Medicine and Science) and the Cystic Fibrosis Foundation Therapeutics (CFFT) for VRT-325, and E. Ficker (Case Western Reserve University, Cleveland, OH, USA) for providing the HERG constructs. Here, CFTR is linked to cystic fibrosis.