STOCKHOLM, SWEDEN - JANUARY 31: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge accompanied by Crown Princess Victoria of Sweden and Prince Daniel of Sweden visit the Karolinska Institute to meet with academics and practitioners to discuss Swedens approach to managing mental health challenges during day two of their Royal visit to Sweden and Norway on January 31, 2018 in Stockholm, Sweden. (Photo by Samir Hussein/Samir Hussein/WireImage)
