CONFLICTS OF INTEREST STATEMENT
This work was supported by the Corno grant of the Dutch Cystic Fibrosis Foundation. The funding source had no role in study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the article for publication. Marieke Verkleij reports grants from the Dutch Cystic Fibrosis Foundation and consulting and speaker’s fees from Vertex Pharmaceuticals.
Berber Vlieg-Boerstra reports research funding from Nutricia, consulting or speaker’s fees from ViniMini, Nestlé and Nutricia.