There are multiple definitions:

1. lymphocyte activating factor(English)

   • BAF, EP, LEM

2. left anterior fascicle(English)

   • ECG, EAS, PVC, ILT, RCC, RFCA, RBBB
   • Cardiology, Electrophysiology, Anatomy
   • https://doi.org…RCEP.119.008173
   • https://doi.org…2872-016-0240-4

3. laminar air flow(English)

   • may refer to indoor bioaerosols in hospital rooms
   • HVAC, HEPA
   • Air pollution, Respiratory system, Preventive medicine
   • https://doi.org…al.pone.0259996