http://www.sec.gov/Archives/edgar/data/947484/000104746916015618/a2229760z424b2.htm
http://www.sec.gov/Archives/edgar/data/1635581/000119312516717089/d437004d424b3.htm
http://www.sec.gov/Archives/edgar/data/1467154/000119312516717193/d233787d424b4.htm