http://www.sec.gov/Archives/edgar/data/1000275/000114036117039452/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1437786/000119312517318396/d478161d424b5.htm
http://www.sec.gov/Archives/edgar/data/1617582/000119312517318414/d407559d424b4.htm
http://www.sec.gov/Archives/edgar/data/732717/000119312517318558/d482049d424b5.htm