Who said "Laughter is medicine that doesn't cost anything."?

This quote is attributed to Dee Dee.

Laughter is medicine that doesn't cost anything. - Dee Dee

"Laughter is medicine that doesn't cost anything."

Dee Dee Humor

"Shut up and leave me alone!"

"I'm busy!"

"Get out of my laboratory!"

"You're so annoying!"

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."