1. Damascus University; Faculty of Medicine; Mazzeh Street Damascus Syrian Arab Republic
2. Cairo University; Faculty of Medicine; Gamal Abdelnaser St Giza Cairo Egypt 11562
3. Ain Shams University; Faculty of Medicine; 391 Ramsis St, Al Abbaseya Cairo Abbasseya Egypt
4. Waikato District Health Board; Manaaki Centre; crn Rolleston and Mary Streets Thames New Zealand 3575