Authors: Timothy J Steiner; Lars Jacob Stovner; Mohammed Al Jumah; Gretchen L Birbeck; Gopalakrishna Gururaj; Rigmor Jensen; Zaza Katsarava; Luiz Paulo Queiroz; Ann I Scher; Redda Tekle-Haimanot; Shuu-Jiun Wang; Paolo Martelletti; Tarun Dua; Somnath Chatterji Journal: J Headache Pain Date: 2013-10-25 Impact factor: 7.277