Lennox-Gastaut Syndrome (LGS)
Here's your citation in American Psychological Association (APA) format:
Lennox-Gastaut Syndrome (LGS). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Lennox-Gastaut+Syndrome+%28LGS%29