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BMC Public Health > 2018 > 18 > 1 > 1-7
Public Health > 2014 > 128 > 11 > 960-967
Academic Pediatrics > 2013 > 13 > 1 > 14-19
Monatsschrift Kinderheilkunde > 2013 > 161 > 6 > 510-517
Journal of Dentistry > 2011 > 39 > Supplement 2 > S9-S19
Social Science & Medicine > 2004 > 58 > 4 > 767-785