I'm at Liverpool University cost of drugs for hiv The party of Ms. Merkel's challenger Peer Steinbrueck, the Social Democrats, gained two percentage points to 25% following a television debate between him and the German chancellor. But the gain was erased by a loss of the same margin from the Greens, to 9%, according to the poll, which was conducted between Sept. 3 and Sept. 9 by the Forsa institute for Stern magazine.