http://www.sec.gov/Archives/edgar/data/1000275/000114036116053963/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1175680/000119312516467380/d66206d424b3.htm
http://www.sec.gov/Archives/edgar/data/1048286/000119312516467497/d105833d424b3.htm
http://www.sec.gov/Archives/edgar/data/886982/000119312516468319/d135147d424b2.htm
http://www.sec.gov/Archives/edgar/data/1531619/000119312516468509/d54430d424b2.htm
http://www.sec.gov/Archives/edgar/data/1663240/000153949716002505/n620_prosx18.htm