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2. European Medicines Agency. Guideline on the pharmaceutical quality of inhalation and nasal products (emea/chmp/qwp/49313/2005corr). 2006. http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500003568.pdf . Accessed 13 Aug 2018.
3. Therapeutic Goods Administration. Guidance 19: inhalation and nasal medicines. 2013. https://www.tga.gov.au/file/5212/download . Accessed 13 Aug 2018.
4. Health Canada. Guidance for industry pharmaceutical quality of inhalation and nasal products. 2006. http://www.hc-sc.gc.ca/dhp-mps/alt_formats/hpfb-dgpsa/pdf/prodpharma/inhalationnas-eng.pdf . Accessed 13 Aug 2018.
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