1. Adelson School of Medicine, Ariel University, Ariel, Israel
2. Pulmonary Clinic, Clalit Health Services, Dan- Petah-Tiqwa District, Israel
3. The Biostatistics & Biomathematics Unit, The Gertner Institute for Epidemiology and Health Policy Research, Ramat-Gan, Israel
4. Department of Neurological Rehabilitation, Sheba Medical Center, Ramat-Gan, Israel