http://www.sec.gov/Archives/edgar/data/886982/000110465915062421/a15-16703_6424b2.htm
http://www.sec.gov/Archives/edgar/data/722803/000119312515306006/d91682d424b3.htm
http://www.sec.gov/Archives/edgar/data/1051470/000119312515306899/d35100d424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000121465915006397/b828151424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000121465915006400/l827150424b2.htm
http://www.sec.gov/Archives/edgar/data/1649184/000153949715001356/n522_pros-x8.htm