Contrasting evidence to reimbursement reality for off-label use (OLU) of drug treatments in cancer care: rationale and design of the CEIT-OLU project oleh Matthias Briel, Lars G Hemkens, Amanda Katherina Herbrand, Andreas Michael Schmitt, Stefan Diem, Hannah Ewald, Anouk Hoogkamer, Markus Joerger, Kimberly Alba Mc Cord, Urban Novak, Sirintip Sricharoenchai, Benjamin Kasenda