There are multiple definitions:

1. Animal Liberation Front(English)

   • PETA
   • Animal welfare, Experimental animal

2. airway lining fluid(English)

   • Pulmonology

3. acute liver failure(English)

   • a rare but dramatic clinical syndrome associated with high rates of morbidity and mortality. Although there are a multitude of causes of ALF, acetaminophen hepatotoxicity remains the most common cause in the United States
   • CH, PAL, CLD
   • Liver disease
   • https://doi.org…47874-8.00002-X
   • https://doi.org…2/hep.510290309
   • https://doi.org…hem.2005.04.013