WE URGE INVESTORS TO READ THE PROXY STATEMENT AS WELL AS THE SCHEDULE 13E-3 AND ANY OTHER RELEVANT DOCUMENTS FILED BY CORNERSTONE OR CHIESI BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT CORNERSTONE AND THE PROPOSED MERGER. INVESTORS ARE URGED TO READ THESE DOCUMENTS CAREFULLY AND IN THEIR ENTIRETY. Investors are able to obtain these materials and other documents filed with the SEC free of charg