Jochen Ehrich1, Ndidi Nwaneri2, Natale de Santo3. 1. European Paediatric Association/Union of National European Paediatric Societies and Associations (EPA/UNEPSA), Berlin, Germany; Children's Hospital, Hannover Medical School, Hannover, Germany. Electronic address: ehrich.jochen@mh-hannover.de. 2. Department of Philosophy, Loyola University of Chicago, Chicago, IL. 3. Department of Medicine and Chair of Nephrology, Second University of Naples, Naples, Italy.