Turk Hematology Society - National professional society of hematology. Organization hosts professional meeting. American Society of Hematology - Professional organization. Includes information about society publications and meetings. Provides educational materials for scientists, doctors, and patients. American Society of Pediatric Hematology/Oncology - Professional group that studies and treats childhood cancer and blood diseases. American Society for Blood and Marrow Transplantation - Professional society. Membership information, meeting information, and online text from the quarterly periodical. European Hematology Association - Scientific society for the development of research and education in hematology. The Society for Hematopathology - Professional society for scientists in the clinical, morphological and functional aspects of the hematopoietic and lymphoreticular systems. International Society for Hematology and Stem Cells - International professional society for clinicians and researchers in the field of experimental hematology including hematopoiesis, oncology, immunology, stem cell biology, transplantation and cell therapy. International Society on Thrombosis and Haemostasis - Professional society. Includes publications, conference information, and educational materials in the area of thrombosis, haemostasis, and hematology.