[1] European Mol Biol Lab EMBL, Cell Biol & Biophys Unit, Heidelberg, Germany
[2] EMBL, Mol Med Partnership Unit, Heidelberg, Germany
[3] Univ Heidelberg, Div Pediat Pulmonol, Heidelberg, Germany
[4] Univ Heidelberg, Dept Pediat 3, CF Ctr, Heidelberg, Germany