Correspondence to V.A. European Foundation for the Study of ChronicLiver Failure ( EF‑CLIF ), Travessera de Gracia 11 , 08021 Barcelona , Spain. vicente.arroyo@efclif.comArticle number : 16041 doi : 10.1038/nrdp.2016.41 Published online 9 June 2016 Vicente Arroyo1 ...