1. Department of Public Health, Istanbul University – Istanbul Faculty of Medicine, Istanbul, Turkey
2. Department of Public Health, Istanbul Medipol University – School of Medicine, Istanbul, Turkey
3. Department of Public Health, Sultangazi District Health Directorate, Turkish Ministry of Health – Istanbul Health Directorate, Istanbul, Turkey
4. Department of Public Health, Hitit University – Faculty of Medicine, Çorum, Turkey
5. Department of Orthopedics, Porta Westfalica Clinic, Bad Oeynhausen, Germany.