| PAR | participating provider; passive avoidance reaction; perennial allergic rhinitis; photosynthetically ... |
|---|---|
| PCA | para-chloramphetamine; parietal cell antibody; passive cutaneous anaphylaxis; patient care assistant... |
| WHCOA | White House Conference on Aging |
| NHA | National Health Association; National Hearing Association; National Hemophilia Association; nonspeci... |
| NPF | nasopharyngeal fiberscope; National Parkinson Foundation; National Pharmaceutical Foundation; Nation... |