Al-Agouza Family Medicine Center (AFMC)., Agouza, Giza, Egypt
Endodontic Department , Faculty of Dentistry , Cairo University, Cairo, Egypt
Abeer Ahmed, Maadi, Cairo, Egypt
Community based study (from the outpatient clinics and the rehabilitation centers at the community at Mansoura city and surrounding cities and villages within Dakahlia), Mansoura, Dakahlia, Egypt
Faculty of physical therapy, Giza, Dokki, Egypt
Faculty of dentistry Cairo university, Giza, Non-US/Non-Canadian, Egypt