1 Pulmonology Institute and CF Center, Carmel Medical center, Haifa, Israel; Technion-Israel Institute of Technology, the B. Rappaport school of medicine.
2 Pulmonology Institute and CF Center, Soroka medical center, and Ben-Gurion University, Beer Sheva, Israel.
3 Pulmonology Institute and CF Center, Carmel Medical center, Haifa, Israel; Technion-Israel Institute of Technology, the B. Rappaport school of medicine. Electronic address: michalsh@technion.ac.il.