1. a Department of Environmental & Occupational Health , Sackler Faculty of Medicine, Tel Aviv University , Tel Aviv , Israel
2. b Department of Management , Bar-Ilan University , Ramat-Gan , Israel
3. c Department of Ophthalmology , Sackler Faculty of Medicine, Tel Aviv University , Tel Aviv , Israel
4. d Rabin Medical Center, Beilinson Hospital , Petach Tikva , Israel