1. College of Science, University of Sumer, Thi-Qar, Iraq.
2. University Teaching Hospital Policlinico-Vittorio Emanuele, University of Catania, Catania, Italy.
3. Faculty of Medicine, Bioscience and Nursing, Mahsa University, Kuala Lumpur, Malaysia.
4. Faculty of Dentistry, Bioscience and Nursing, Mahsa University, Kuala Lumpur, Malaysia.