There are multiple definitions:

1. prostatic intraepithelial or intraductal neoplasia(English)

   • PSA, PPB
   • Prostate, Oncology

2. posterior interosseous nerve(English)

   • refers to neurectomy
   • AIN, FCR
   • Nervous activity - (para)sympathetic, Surgery
   • https://doi.org…589447221122822
   • https://musculo…wrist-and-hand/

3. personal identity number(English)

   • as the unique identifier
   • MiDAS, LISA, RAMS, TPR
   • Big data, Registry
   • https://scb.se/…search/?tab=ssd
   • https://doi.org…654-019-00511-8