| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
|---|---|
| NTA | 1) Naso-Tracheal Aspiration 2) National Tuberculosis Association |
| TTA | Trans-Tracheal Aspiration |
| CTSS | cathepsin S; closed tracheal suction system |
| ETC | electron transport chain; esophageal tracheal combitude; estimated time of conception |