 STOCKHOLM, May 3, 2021 PRNewswire -- Calliditas Therapeutics AB Nasdaq: CALT Nasdaq Stockholm: CALTX Calliditas today announced that former Head of North America Commercial, Andrew Udell, has been promoted to President, North America, effective immediately. Andrew has been instrumental in the growth of the US operations over the last 12 months and has done a great job of creating a strong connection between the US and European teams throughout this period of high growth. 