| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
|---|---|
| ASP | abnormal spinal posture; acute symmetric polyarthritis; African swine pox; aged substrate plasma; al... |
| HELP | Hawaii early learning profile; Health Education Library Program; Health Emergency Loan Program; Heal... |
| UP | parallax unsharpness; ulcerative proctitis; ultrahigh purity; unipolar; upright posture; ureteropelv... |
| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |