OSF welcomes the world: its guests come from 130 different nations In 2020, 19,668 guests of 130 different nationalities took advantage of the services of OSF on at least one occasion. In 2020, the year of the coronavirus pandemic, Peru was once again the most represented nation accounting for 19% of guests, who mainly required treatment at the Clinic. Next came Italian guests who accounted for 14% of those using the OSF’s services, unchanged compared with last year. Find out more about OSF Our history Our mission Who we help Articles of Association