Financial & competing interests disclosure
N Katsiki has given talks and attended conferences sponsored by Novartis, Pfizer, MSD and AstraZeneca. A Karagiannis has given talks and attended conferences sponsored by Menarini, AstraZeneca, Novartis and Pfizer. The authors have 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.