Search results
International Journal of Public Health > 2015 > 60 > 6 > 727-736
BMC Public Health > 2015 > 15 > 1 > 1-9
Canadian Journal of Public Health > 2013 > 104 > 6 > S21-S25
The Journal of Headache and Pain > 2011 > 12 > 2 > 157-172
European Journal of Epidemiology > 2010 > 25 > 3 > 183-193