Oh, yes, online gaming ADDICTION.
The Big Bang Theory Season 2, Episode 3
I'm right in the middle
of my ADDICTION study.
The Big Bang Theory Season 5, Episode 15
...gambling ADDICTION
and sexually-transmitted diseases.
The Big Bang Theory Season 2, Episode 21
He's one of the animals in my
department's nicotine ADDICTION study.
The Big Bang Theory Season 4, Episode 21
Don't forget genetic predisposition
towards ADDICTION.
The Big Bang Theory Season 1, Episode 10