| LES | Lower esophageal sphincter |
| EGJ | Esophago-gastric junction |
| EGJOO | Esophago-gastric outflow obstruction |
| HRM | High-resolution manometry |
| POEM | Per oral endoscopic myotomy |
| EoE | Eosinophilic esophagitis |
| EGD | Esophago-gastro-duodenoscopy |
| LHM | Laparoscopic Heller myotomy |
| RDC | Rapid drinking challenge |
| MRS | Multiple rapid swallows |
| TBS | Timed barium swallow |
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