1. Code of Federal Regulations §21-314. Applications for FDA approval to market a new drug. https://www.ecfr.gov/cgi-bin/text-idx?SID=010a94318c67beab1667440e18632a2f&mc=true&tpl=/ecfrbrowse/Title21/21cfr314_main_02.tpl. Accessed 4 April 2017.
2. Code of Federal Regulations §21-601. Licensing. https://www.ecfr.gov/cgi-bin/text-idx?SID=51c955e0ef369e2db2f0c3745a065028&mc=true&tpl=/ecfrbrowse/Title21/21cfr601_main_02.tpl. Accessed 4 April 2017.
3. US Food and Drug Administration. Guidance for industry: expedited programs for serious conditions–drugs and biologics (May 2014). http://www.fda.gov/downloads/drugs/guidancecomplianceregulatoryinformation/guidances/ucm358301.pdf. Accessed 4 April 2017.
4. U.S. Food and Drug Administration. CDER breakthrough therapy designation approvals as of Dec. 31, 2016. https://www.fda.gov/downloads/Drugs/DevelopmentApprovalProcess/HowDrugsareDevelopedandApproved/DrugandBiologicApprovalReports/NDAandBLAApprovalReports/UCM481542.pdf. Accessed 4 April 2017.
5. Code of Federal Regulations §21-314.500. Scope. https://www.ecfr.gov/cgi-bin/text-idx?SID=7bf54b0bb4290e41dc98c39e6ec242fe&mc=true&node=se21.5.314_1500&rgn=div8. Accessed 4 April 2017.