| A/B | acid-base ratio |
|---|---|
| AIDSDRUGS | clinical trials of acquired immunodeficiency drugs [MEDLARS data base] |
| AIDSTRIALS | clinical trials of acquired immunodeficiency syndrome drugs [MEDLARS data base] |
| BAB | blood agar base |
| BASE | B27-arthritis-sacroiliitis-extra-articular features [syndrome] |