EffectiveNess of a multimodal preHAbilitation program in patieNts with bladder canCEr undergoing radical cystectomy: protocol of the ENHANCE multicentre randomised controlled trial oleh Anne M May, Maike G Sweegers, Wim H Van Harten, Martijn M Stuiver, Alina Vrieling, Richard P Meijer, Antoine G van der Heijden, Wim G Groen, Emine Akdemir, Helene Rundqvist, Annemarie M Leliveld-Kors, Vera C Rutten, Evert L Koldewijn, Siebe D Bos, Carl J Wijburg, Tom A T Marcelissen, Bart C Bongers, Valesca P Retèl