hajar shekarchizadeh 1. research center for caries prevention, community oral health department, school of dentistry, tehran university of medical sciences , tehran, iran ; 2. dept. of oral public health, university of helsinki , helsinki, finland. mohammad r khami 2. dept. of oral public health, university of helsinki , helsinki, finland ; 3. dental research center, community oral health department, school of dentistry, tehran university of medical sciences , tehran, iran. simin z mohebbi 1. research center for caries prevention, community oral health department, school of dentistry, tehran university of medical sciences , tehran, iran ; 2. dept. of oral public health, university of helsinki , helsinki, finland. hamed ekhtiari 4. translational neuroscience program, institute for cognitive science studies , iran ; 5. neurocognitive laboratory, iranian national center for addiction studies, tehran university of medical sciences , tehran, iran. jorma i virtanen 6. dept. of community dentistry, university of oulu , oulu, finland ; 7. dept. of public health, university of helsinki , helsinki, finland.

s el-zaemey section of environment and radiation international agency for research on cancer, lyon, france j schüz section of environment and radiation international agency for research on cancer, lyon, france me leon section of environment and radiation international agency for research on cancer, lyon, france

Afsaneh Niakani, Ehsan Saboory, Javid Fereidoni, Mohamad-Reza Azad, Morteza Gholami, Nafiseh Banihabib, Sogol Mehraban,