"Being on the computer for more than 4 hours a day causes depression." -- "Listening to music for more than 6 hours causes depression."
"Being on the computer for more than 4 hours a day causes depression." -- "Listening to music for more than 6 hours causes depression."
"Being on the computer for more than 4 hours a day causes depression." -- "Listening to music for more than 6 hours causes depression."
