DKMS is saying #ThankYouDonor this World Marrow Donor Day by highlighting an amazing and truly inspirational donor and recipient story.   Marco, from Germany, was diagnosed with Leukaemia in February 2012 and was told that he would need a blood stem cell donation in order to survive. In August of that year, he received a blood stem cell donation from his donor Daniel, who lives in Nottingham in the UK. Four years later, they met for the first time this August. Daniel visited Marco and his family in Germany and they enjoyed a great time together, including a visit to…