There are multiple definitions:

1. clinical question(English)

   • PICO
   • Guidelines, Diagnostics
   • https://doi.org…esp.2021.02.018

2. camphorquinone(English)

   • a photoinitiator
   • LCU, LED, MAPO, TPO
   • Dentistry, Materials science
   • https://doi.org…ent.2011.10.018

3. chloroquine(English)

   • ATF6, ER, HCV, IFN-γ, IRE1, PERK, UPR, CNT1, ENT1
   • Virology, Therapeutic approaches
   • https://doi.org/10.1002/rmv.1973