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Italian Journal of Pediatrics > 2018 > 44 > 1 > 1-11
The Journal of Headache and Pain > 2017 > 18 > 1 > 1-6
International Journal of Public Health > 2018 > 63 > 2 > 181-192
The Journal of Headache and Pain > 2010 > 11 > 2 > 97-104