There are multiple definitions:

1. usual interstitial pneumonia(English)

   • CPFE, DLCO, IFP, PH
   • Pulmonology

2. Union Internationale de Phlébologie(French)

   • AASV, GSV, PTV, SPJ, SSV, TE
   • Vessel properties, Organizations (scientific), Organizations (governmental)
   • https://doi.org…jvs.2005.07.020