| PDR | pediatric radiology; peripheral diabetic retinopathy; Physicians' Desk Reference; postdelivery room;... |
|---|---|
| ARP | absolute refractory period; American Registry of Pathologists; anticipated recovery path; apolipopro... |
| CRM | Certified Reference Materials; counting rate meter; cross-reacting material; crown-rump measurement |
| IRU | industrial rehabilitation unit; interferon reference unit |
| MRO | master reference oscillator; medical review officer; minimal recognizable odor; muscle receptor orga... |