1 Pulmonary Department, Meir Medical Center, Kfar Saba, Israel; Sackler School of Medicine, Tel Aviv University, Kfar Saba, Israel.
2 Pulmonary Department, Meir Medical Center, Kfar Saba, Israel.
3 Pulmonary Department, Meir Medical Center, Kfar Saba, Israel; Sackler School of Medicine, Tel Aviv University, Kfar Saba, Israel. Electronic address: Davids3@clalit.org.il.