CHTP - Blackrock filed 13G and doubled their position today, now holding with 7.2% Number of shares beneficially owned by each reporting person with: (5) Sole voting power 5549376 (6) Shared voting power None (7) Sole dispositive power 5661093 (8) Shared dispositive power None (9) Aggregate amount beneficially owned by each reporting person 5661093 (10) Check if the aggregate amount in Row (9) excludes certain shares (11) Percent of class represented by amount in Row 9 7.2% http://www.sec.gov/cgi-bin/browse-edgar?CIK=chtp&Find=Search&owner=exclude&action=getcompany