I'm not sure you can even blame the big drugs companies - it's often back-street people mixing up their own concoctions.

BBC: SPORT | How do new drugs get into sport?

B-mesons to turn into their antimatter counterparts and back again, a process known as mixing.

ECONOMIST: Cosmology and particle physics

At school, they say knowingly, he was a loner: not given to mixing, always hanging around at the back when team games were being organized.

CNN: Mahathir Mohamad