Chicago Blackhawks center Jonathan Toews is still uncertain about his return from a concussion.Toews has missed nearly a month of action since suffering the injury on Feb. 19. He was expected back earlier this week but his symptoms did not go away. Toews is no longer skating with the team and doesn’t have a time table for his return.“He’s a hockey player and he wants to play,” Chicago head coach Joel Quenneville told reporters. “The process, I’m sure in his mind, is not a fun thing to be dealing with. You want to be optimistic; there was that stretch there where he was getting close. There’s hope, and that’s where we’re at.”Toews has 29 goals and 28 assists on the year. The Blackhawks have gone 7-4-1 without him in the lineup.