| SFIS | structural family interaction scale |
|---|---|
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| TSI | 1) Thyroid Stimulating Immunoglobulin 2) Triple Sugar Iron agar |
| FACIT | fibril-associated collagen with interrupted triple helices |
| TCABG | triple coronary artery bypass graft |