Text and Data Mining valid from 2018-10-31
Received: 16 August 2018
Accepted: 24 October 2018
First Online: 31 October 2018
Compliance with Ethical Standards
: DJS is supported by the Medical Research Council of South Africa and has received research grants and/or consultancy honoraria from Abbott, Astrazeneca, Eli-Lilly, GlaxoSmithKline, Jazz Pharmaceuticals, Johnson & Johnson, Lundbeck, Orion, Pfizer, Pharmacia, Roche, Servier, Solvay, Sumitomo, Takeda, Tikvah, and Wyeth. The other authors declare no conflict of interest.