International Society on Thrombosis and Haemostasis
- Professional society. Includes publications, conference information, and educational materials in the area of thrombosis, haemostasis, and hematology.
- http://www.med.unc.edu/isth/

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.
- http://www.iseh.org/

The Society for Hematopathology
- Professional society for scientists in the clinical, morphological and functional aspects of the hematopoietic and lymphoreticular systems.
- http://www.socforheme.org

Turk Hematology Society
- National professional society of hematology. Organization hosts professional meeting.
- http://www.thd.org.tr

European Hematology Association
- Scientific society for the development of research and education in hematology.
- http://www.ehaweb.org/

American Society for Blood and Marrow Transplantation
- Professional society. Membership information, meeting information, and online text from the quarterly periodical.
- http://www.asbmt.org/

American Society of Pediatric Hematology/Oncology
- Professional group that studies and treats childhood cancer and blood diseases.
- http://www.aspho.org/

American Society of Hematology
- Professional organization. Includes information about society publications and meetings. Provides educational materials for scientists, doctors, and patients.
- http://www.hematology.org/