Effect of exogenous estrogens and progestogens on the course of migraine during reproductive age: a consensus statement by the European Headache Federation (EHF) and the European S... oleh Simona Sacco, Gabriele S. Merki-Feld, Karen Lehrmann Ægidius, Johannes Bitzer, Marianne Canonico, Andreas R. Gantenbein, Tobias Kurth, Christian Lampl, Øjvind Lidegaard, E. Anne MacGregor, Antoinette MaassenVanDenBrink, Dimos-Dimitrios Mitsikostas, Rossella Elena Nappi, George Ntaios, Koen Paemeleire, Per Morten Sandset, Gisela Marie Terwindt, Kjersti Grøtta Vetvik, Paolo Martelletti, on behalf of the European Headache Federation (EHF), the European Society of Contraception and Reproductive Health (ESCRH)