0872-671X 0872-671X S0872-671X2021000100052 10.24950/r/190/20/1/2021 Portugal Portugal Portugal Portugal 00 03 2021 00 03 2021 28 1 52 58

1 Global Burden of Disease 2016 Headache Collaborators 1990 2 2019 99 17-24 3 2012 16 86-92 4 Headache Classification Committee of the International Headache Society 2013 33 629-808 5 2012 39 S1-59 6 Gradall A et al 2015 10 7 2019 20 57 8 2020 30 6 6 965-82 9 Schumacher H et al 2009 29 921-7 10 Scottish Intercollegiate Guidelines Network 2018 11 Ashman E et al 2012 78 1337-45 12 2019 23 85 13 2014 14 1043-55 14 2007 128 209-14 15 Henderson VW et al 2018 360 k96 16 2007 369 1208-19 17 2018 38 1817-24 18 2014 24 244-8 19 Sand T et al 2014 34 523-32 20 2004 69 548-56 21 2003 289 65-9 22 Toward Optimized Practice 2016 23 2001 322 19 24 2012 13 S31-70 25 2007 14 701-3 26 2009 16 968-81 27 2019 20 113 28 1992 141 475-81 29 2013 4 72-7 30 2013 28 1225-37 31 1987 7 485-6 32 2020 27 512-9 33 2001 50 299 34 2006 46 503-7 35 2013 18 289-91 36 2016 16 331-9