Saudi Arabia is presenting its experience stem cells and bone marrow transplantation at the fourth Worldwide Network for Blood and Marrow Transplantation, which began here today. Organized by the King Faisal Specialist Hospital and Research Center, the three-day conference is being addressed by 100 specialists in the field, representing 32 Middle East and North African states. The aim of the conference is to exchange their research findings in stem cells and bone marrow transplantation and strengthen the potential of the participating countries in this field.