LEVERKUSEN, Germany : Champions Bayer Leverkusen twice hit the woodwork and missed a bagful of chances but could not score in a goalless draw against visitors VfB Stuttgart in the Bundesliga on Friday. Leverkusen, who travel to Liverpool for the Champions League on Tuesday, have now won just one of their last five league games, and are in third place on 16 points. Bayern Munich, top on 20, host Union Berlin on Saturday. In a one-sided first half the hosts missed more than half a dozen golden