Transparency
Declaration of funding
The authors received no payment in preparation of this manuscript.
Declaration of financial/other relationships
E.C. has disclosed that he has no significant relationships with or financial interests in any commercial companies related to this study or article. G.W.C. is member of the Uriach scientific advisory board.
CMRO peer reviewers may have received honoraria for their review work. The peer reviewers on this manuscript have disclosed that they have no relevant financial relationships.