‘Effects of a home-based bimodal lifestyle intervention in frail patients with end-stage liver disease awaiting orthotopic liver transplantation’: study protocol of a non-randomise... oleh Hans Blokzijl, Vincent E de Meijer, Rienk Dekker, Joost M Klaase, Coby Annema, Bart C Bongers, Allard G Wijma, Job AM van der Palen, Frans JC Cuperus