There are multiple definitions:

1. idiopathic pulmonary fibrosis(English)

   • a condition in which the lungs become scarred and breathing becomes increasingly difficult. Cause is largely unknown, but it usually affects people who are around 70 to 75 years old, and is rare in people under 50
   • FVC, ILD, UIP, AEP, COPD, CPFE, DIP, LCH, RB-ILD, UIP-IPF
   • Pulmonology
   • https://www.pul…monary-fibrosis
   • https://doi.org…eng.2022.10.008

2. immature platelet fraction(English)

   • percentage of immature platelets
   • MPC, MPM, MPV, P-LCR, PCDW, PCT, PDW
   • Hematology, Thrombocyte /thrombosis, Ratio-based metric
   • https://doi.org…613/BM.2016.020

3. iterative proportional fitting(English)

   • Statistics, Model(ing)
   • https://pubmed.…ih.gov/7407317/

4. interstitial pulmonary fibrosis(English)

   • associated with persistent cellular infiltration and progressive connective tissue accumulation in the alveolar walls
   • BLM, CHF, COPD, FAK, PTK2
   • Pulmonology, Pathology
   • https://doi.org…38/nrdp.2017.74
   • https://doi.org…931-023-02582-4