| URD | unspecified respiratory disease; upper respiratory disease |
|---|---|
| URI | uniform resource identifier; upper respiratory illness; upper respiratory infection |
| HP | Hypersensitivity Pneumonitis = Extrinsic Allergic Alveolitis |
| CBH | chronic benign hepatitis; cutaneous basophilic hypersensitivity |
| CHS | central hypoventilation syndrome; Chediak-Higashi syndrome; cholinesterase; chondroitin sulfate; com... |