| FAB classification | French, American, British classification |
|---|---|
| AAAHE | American Association for the Advancement of Health Education |
| AAAI | American Academy of Allergy and Immunology |
| AAALAC | American Association for Accreditation of Laboratory Animal Care |
| AAAS | American Association for the Advancement of Science |
| RAFS | Revised American Fertility Society |
|---|---|
| R.E.A.L. | Revised European American Classification of Lymphoid Neoplasms |
| REAL | Revised European American Lymphoma |
| SLICC/ACR | Systemic Lupus International Collaborating Clinics/American College of Rheumatology |