Declaration of interest
M Mula has received consultancy fees from UCB Pharma, Eisai, Bial and Elsevier. The author has intellectual property rights with Springer. The author has no other 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 apart from those disclosed.
Acknowledgments and financial disclosure
The author has received no assistance and no funding to write this paper. In the past, the author has received consultancy fees from UCB Pharma, Eisai, Bial and Elsevier. The author has intellectual property rights with Springer.