Declaration of interest
Outside this article, the author has received grants from MSD, consultant fees from Biogen, European Union: grants for several projects, WHO: honoraria for WHO´s GDO project. The author has no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
Reviewers disclosure
Peer reviewers on this manuscript have no relevant financial relationships or otherwise to disclose.