| PID | pain intensity difference [score]; pelvic inflammatory disease; photoionization detector; picture im... |
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| PIDT | plasma iron disappearance time |
| PIT | pacing-induced tachycardia; patella inhibition test; picture identification test; pitocin; pitressin... |
| PITR | plasma iron turnover rate |
| RCIT | red cell iron turnover |
| live oral poliovirus vaccine | Inactivated poliovirus vaccine (IPV), an aqueous suspension of inactivated strains of poliomyelitis virus (types 1, 2, and 3) used by injection; has largely been replaced by the oral vaccine. See: Salk vaccine. (05 Mar 2000) |
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