| LOS(P) | lower [o]esophageal sphincter (pressure) |
|---|---|
| MaxEP | maximum esophageal pressure |
| NEMD | nonspecific esophageal motor dysfunction |
| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
| OES | oral esophageal stethoscope; optical emission spectroscopy |