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. Accessed 12 Jan 2014.
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. Accessed 12 Jan 2014.
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http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500002874.pdf
. Accessed 19 Sept 2014.
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http://www.fda.gov/AdvisoryCommittees/CommitteesMeetingMaterials/Drugs/default.htm
. Accessed 18 May 2014.