Prof. Vlatko Pejša MD, PhD, graduated from Medical School University of Zagreb, Croatia. He finished his residency in Internal medicine and works as Hematology consultant. He is Professor at School of Medicine, University of Zagreb. For more than 20 years he has been head of Hematology Department at University Hospital Dubrava, Zagreb, where he established stem cell transplantation program. The primary scientific interest of Prof. Pejša is basic and clinical research in CLL and lymphoma. He is active member of EBMT; EORTC and CroHem; the Croatian Cooperative Group for Hematologic Diseases. He is also leader of the working group for CLL of CroHem, member of the Steering Committee of the Croatian Hematologic Society and member of the Steering Committee of charitable Croatian Leukaemia - Lymphoma Association.