First Online: 16 November 2018
Ethics approval and consent to participate
: Not applicable.
: All the patients gave written consent for publication of their echocardiographic images.
: LB declares that she has no competing interests. PR received unconditional grants from BioMarin and participated in a cardiology advisory board for BioMarin. GL received unrestricted grants from Shire and participated in advisory boards for BioMarin and Genzyme.
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