DOI:
10.1055/s-00000058
Planta Medica
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References
Lewis CJ.
Safety alerts and advisories – FDA advises dietary supplement manufacturers to remove comfrey products from the market; 2001.
Available at:
https://www.fda.gov/Food/RecallsOutbreaksEmergencies/SafetyAlertsAdvisories/ucm111219.htm Accessed April 14, 2017
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