http://www.sec.gov/Archives/edgar/data/1000275/000114036118042853/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1000275/000114036118042887/form424b2.htm
http://www.sec.gov/Archives/edgar/data/1552000/000119312518323034/d651104d424b5.htm
http://www.sec.gov/Archives/edgar/data/1023421/000119312518323454/d540128d424b3.htm
http://www.sec.gov/Archives/edgar/data/873303/000119312518323889/d621826d424b5.htm
http://www.sec.gov/Archives/edgar/data/1427925/000143774918020163/acrx20181107_424b5.htm