There are multiple definitions:

1. Laboratory Animal Science Association(English)

   • in United Kingdom
   • FELASA
   • Organizations (documentation), Experimental animal
   • https://www.lasa.co.uk/

2. Longitudinal Aging Study Amsterdam(English)

   • this study determines predictors and consequences of aging, started in 1991 and investigates physical, emotional, cognitive and social functioning of elderly in the Netherlands
   • Aging, Organizations (research), Cognitive function
   • https://www.lasa-vu.nl/index.htm