| SPEC | specificity |
|---|---|
| HLA | histocompatibility leukocyte antigen; histocompatibility locus antigen; homologous leukocyte antibod... |
| ER | efficiency ratio; epigastric region; ejection rate; electroresection; emergency room; endoplasmic re... |
| RAR | rapidly adapting receptor; rat insulin receptor; retinoic acid receptor; right arm reclining; right ... |
| TSA | technical surgical assistance; toluene sulfonic acid; total shoulder arthroplasty; total solute abso... |