http://www.sec.gov/Archives/edgar/data/1604821/000104746915005923/a2225305z424b4.htm
http://www.sec.gov/Archives/edgar/data/1645061/000119312515244421/d942796d424b5.htm
http://www.sec.gov/Archives/edgar/data/1000275/000121465915005183/n71151424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000121465915005198/n72150424b2.htm