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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2005 4
2008 2
2009 4
2010 2
2011 4
2012 2
2013 4
2014 5
2015 2
2016 6
2017 11
2018 5
2019 1
2020 2
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Page 1
Ephedra alkaloid contents of Chinese herbal formulae sold in Taiwan.
Chang CW, Hsu SY, Huang GQ, Hsu MC. Chang CW, et al. Among authors: Hsu SY, Hsu MC. Drug Test Anal. 2018 Feb;10(2):350-356. doi: 10.1002/dta.2209. Epub 2017 Jun 23. Drug Test Anal. 2018. PMID: 28444836
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