Although yelp currently shows that this facility is only open on Mondays, they are open 6 days a week.They do blood tests. take urine samples and do electrocardiograms.
This lab is convenient (a short walk from St. Clair subway station), clean and efficient. The staff are pleasant and they know how to take blood with a minimum of unpleasantness. The only reason why I didn't provide a 5 star rating is they were understaffed; it was standing room only this morning.