1. National Institute for Medical Research Development (NIMAD); Cochrane Iran Associate Centre; Tehran Iran
2. Medical University of Vienna; Department of Emergency Medicine; Allgemeines Krankenhaus, Währinger Gürtel 18-20, Vienna Austria 1090
3. Beth Israel Deaconess Medical Center, Harvard Medical School; Radiology; 330 Brookline Ave Boston MA USA 02215
4. Luxembourg Institute of Health; Department of Population Health; 1A-B, rue Thomas Edison Strassen Luxembourg 1445
5. Department of Mathematics and Statistics; Health Research Institute (HRI) and MACSI; University of Limerick Ireland