Intestinal current measurements detect activation of mutant CFTR in patients with cystic fibrosis with the G551D mutation treated with ivacaftor - Gräber, Simon Y.; Hug, Martin J.; Sommerburg, Olaf; Hirtz, Stephanie; Hentschel, Julia; Heinzmann, Andrea; Dopfer, Christian; Schulz, Angela; Mainz, Jochen G.; Tümmler, Burkhard; Mall, Marcus A. (American journal of respiratory and critical care medicine, 2015)