| MMWR | Morbidity and Mortality Weekly Report |
|---|---|
| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
| PR | by way of the rectum [Lat. per rectum]; far point [of accommodation] [Lat. punctum remotum]; palindr... |
| PRE | photoreacting enzyme; physician's report of examination; pigmented retinal epithelium; preplacement ... |
| PRF | partial reinforcement; patient report form; perforin; plasma recognition factor; pontine reticular f... |