There are multiple definitions:

1. patient-controlled analgesia(English)

   • IPCA, IV-PCA
   • Anesthesiology/analgesia, Therapeutic approaches, Pain
   • https://doi.org…jnccn.2022.7034
   • https://doi.org…155/2011/934932

2. principal component analysis(English)

   • DPCoA, AAMM, FPCA, ICA, KPCA, LDB, MR-PCA, SOBI, MCA, pPCA, HCPC, MFA, PCoA
   • Statistics, Signal analysis
   • https://doi.org…OC.2021.3052449
   • https://doi.org…390/jcm12216706
   • https://doi.org…sci.2023.108478

3. physician's comparability allowance(English)

4. Purkinje-cell antibody(English)

5. packed column aeration(English)

   • EPA
   • Environment

6. posterior cerebral artery(English)

   • ACA, aSAH, FD, FRED, MCA, SCA
   • Anatomy, Brain (dys)function, Vascular disease
   • https://doi.org…604-022-01354-2

7. pulse contour analysis(English)

   • AC, AIx, DBP, PWV, RTT, SBP, WSA
   • Hemodynamics, Vessel properties

8. posterior cortical atrophy(English)

   • suggests disturbances in upright perception
   • AD, ARTFL, CU, CDR, CSF, FAQ, FTD, GDS, MCI, MMSE, NfL, PET, PPA, PSP, SEADL, SUVR, TDP, TES, 18F-FTP
   • Alzheimer's disease
   • https://doi.org/10.1113/JP282289
   • https://doi.org…4422(21)00214-3

9. Portable Clinical Analyzer(English)

   • PVCA
   • Clinical chemistry
   • https://doi.org…365519609088630

10. pancreatic caudal artery(English)

    • CNR, DECT, MEI, PDAC, PEI, PSPDA, SNR, AIPDA, PIPDA
    • Medical imaging, Pancreas, Oncology
    • https://doi.org…244-022-01157-z

11. L-pyrrolidone carboxylate(English)

    • IGA, MF, NSC, SD, SI
    • Dermatology
    • https://doi.org…555-019-00339-w

12. primary cicatricial alopecia(English)

    • represents a challenging group of disorders that result in irreversible hair loss from the destruction and fibrosis of hair follicles. Scalp skin biopsies are considered essential in investigating these conditions
    • AGA, DP, EDD, MEDD, NHS, TTA
    • Dermatology, Biopsy
    • https://doi.org…edicines9121755

13. passive cutaneous anaphylaxis(English)

    • ATTC, BMMC, MCP-1, MIP-1a, NRS, TGF-ß
    • Allergy, Dermatology
    • https://doi.org…mai.2000.107036

14. protocatechuic acid(English)

    • refers to its potential protective effects on the brain in neurotoxicity induced by cisplatin
    • AChE, CIS, GABA, OSI, TAC, TOS, WBC
    • Toxicology, Brain (dys)function, Therapeutic approaches
    • https://doi.org…54.2022.2147430