title: Invited commentary.
authors.affiliation: Cardiac, Thoracic and Vascular Surgery, Mainz University Hospital, Langenbeckstr 1, #505, Mainz, 55131 Germany. heinemann@uni-mainz.de
authors.forename: Markus K
authors.initials: MK
authors.lastname: Heinemann
mesh_terms: D018729:Fontan Procedure / Q000009:adverse effects*; D006801:Humans; D011504:Protein-Losing Enteropathies / Q000209:etiology*