Eveline Van Keymeulen is a Counsel and Tine Carmeliet is an Associate in the Life Sciences team at Allen & Overy LLP. The views expressed in this publication are those of the authors and do not represent the views of the firm or any third party. For correspondence: <mailto: eveline.vankeymeulen@allenovery.com> <mailto:tine.carmeliet@allenovery.com>