Actually, according to that article he did retire. Translation:
"I won't play hockey again. I still have a valid contract with Chicago for three more years, but my health is a priority and my health won't allow me to return.
"
"NHL leadership sent me to see a specialist in Minnesota prior to this season who confirmed that I could no longer play while taking this medication. My health is a priority and I don't want it to regress to the state from the last few seasons."
"We will see how the club will deal with this situation. Perhaps they will trade my contract into a different club, I can't say right now. Or I will stay on the list of injured players."
"My daughter starts school next year, so we had to make a decision. We will live in Slovakia."