http://www.sec.gov/Archives/edgar/data/51143/000104746915008304/a2226379z424b3.htm
http://www.sec.gov/Archives/edgar/data/40729/000114420415062637/v423687_424b2.htm
http://www.sec.gov/Archives/edgar/data/912593/000119312515364806/d73905d424b5.htm
http://www.sec.gov/Archives/edgar/data/1399080/000119312515365683/d90390d424b5.htm