| EN | Enteral Nutrition |
| PN | Parenteral Nutrition |
| ICU | Intensive Care Unit |
| GI | Gastrointestinal |
| EE | Energy Expenditure |
| COVID-19 | Novel Coronavirus SARS-CoV2 |
| IV | Intravenous |
| NG | Nasogastric |
| MV | Mechanical Ventilation |
| BMI | Body Mass Index |
| ESICM | European Society of Intensive Care Medicine |
| OP | Operation |
| HR | Heart Rate |
| BP | Blood Pressure |
| Reccurent | Recurrent of oral cancer |
| RGV | Residual Gastric Volume |
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