1. University Hospital of Obstetrics and Gynecology in Damascus, Damascus, Syrian Arab Republic
2. Children’s Hospital Damascus, Damascus, Syrian Arab Republic
3. Stemosis for Scientific Research, Damascus, Syrian Arab Republic
4. Al-balqa Applied University, Jordan
5. Damascus University, Faculty of Medicine, Damascus, Syria
6. Department of Radiology, Faculty of Medicine, Damascus University, Damascus, Syria
7. Department of Otorhinolaryngology, Al Mouwasat University Hospital, Faculty of Medicine, Damascus University, Damascus, Syria
8. Faculty of Medicine, Syrian Private University, Damascus, Syria
9. Yarmouk University, Irbid, Jordan.