There are multiple definitions:

1. Burroughs Wellcome Fund(English)

   • AAP, APSA, ASCI, JEDI, MD, MSTP, PhD, PST-DWG, URM, VSRP
   • Charity
   • https://doi.org….1172/JCI176035

2. behavior following wakefulness(English)

   • AFS, LSEQ, QOS
   • Sleep medicine, Behavior(al science)
   • https://doi.org/10.1002/hup.534