Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Save this search Download search results Subscribe to news feed Your filters: cql: author="Bitzer, Johannes" or (type any "bookEditor issueEditor" and editor="Bitzer, Johannes") Add to list Journal Article A1 open access 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 Society of Contraception and Reproductive Health (ESCRH) 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, et al. (2018) JOURNAL OF HEADACHE AND PAIN. 19. Add to list Journal Article A1 open access Women’s perceptions and reasons for choosing the pill, patch, or ring in the CHOICE study : a cross-sectional survey of contraceptive method selection after counseling Christian Egarter, Brigitte Frey Tirri, Johannes Bitzer, Vyacheslav Kaminskyy, Björn J Oddens, Vera Prilepskaya, Arie Yeshaya, Maya Marintcheva-Petrova and Steven Weyers (UGent) (2013) BMC WOMENS HEALTH. 13.