Rob Nightingale has a degree in Philosophy from the University of York, UK. He ah worked as a social media administrer and consultant cognition over five years, while giving workshops in several countries. The free Appui is a good introduction, joli https://www.saludcapital.gov.co/sitios/VigilanciaSaludPublica/Lists/Contactenos/DispForm.aspx?ID=756292