| EN | Enteral nutrition |
| fT3 | Free T3 |
| fT4 | Free T4 |
| L-T4 | Levothyroxine (L-thyroxine) |
| MCT | Monocarboxylate transporter family |
| NTCP | Sodium-taurocholate co-transporting polypeptide transporters |
| OATP | Organic anion-transporting polypeptide family |
| PDA | Prolonged Dose Adjustment |
| PPI | Pomp proton inhibitors |
| RCT | Randomized control trial |
| T3 | Triiodothyronine |
| T4 | Thyroxine |
| TFT | Thyroid function tests |
| TSH | Thyroid-stimulating hormone |
| TT4 | Serum total thyroxine level |
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