Conflicts of interest

PT reports fees from Silverchair, grants from MetaOptima Technology Inc. and Lilly, and speaker honoraria from Lilly FotoFinder and Novartis, all outside the submitted work. HK reports speaker fees from Fotofinder, La Roche Posay, and Healthcert, license fees from Casio, Barco, and etaOptima, and provision of equipment from Casio, Fotofinder, Heine, 3-Gen, and Derma Medical Systems all outside the submitted work.The other authors do not have any conflict of interests for the present work.