“…This rationale is based on what has been learned over the years from observational studies, controlled clinical trials, pathophysiological concepts and, more recently, real-world registries. In this context, treatment algorithms from many countries 11,20,21,22,23,24,25,26,27,28,29,30,31 have been guided by what have turned out to be very important concepts: 1) early and effective treatment; 2) the existence of a therapeutic window of opportunity; 3) early optimization of treatment during the therapeutic window; 4) the existence of different clinical and radiological phenotypes; and 5) treatment decisions based on different levels of inflammatory activity and/or specific clinical phenotypes, wherever possible, always favoring the best efficacy/risk ratio.…”