Transferable data exclusivity vouchers are not the solution to the antimicrobial drug development crisis: a commentary on the proposed EU pharma regulation - Till Bärnighausen; Albrecht Jahn; Astrid Berner-Rodoreda; Frank Cobelens; Mario Raviglione; Jolene Skordis; Anne-Mieke Vandamme; Günter Froeschl; Elil Renganathan; Ellen t’Hoen (BMJ Global Health)