| Liu F, Wan SY, Jiang Z, et al. Determination of pyrrolizidine alkaloids in comfrey by liquid chromatography-electrospray ionization mass spectrometry. [Journal Article] Talanta 2009 Dec 15; 80(2):916-23. Abstract | Full Citation | Publisher Full Text | Find Related Articles | | Benedek B, Ziegler A, Ottersbach P Absence of mutagenic effects of a particular Symphytum officinale L. liquid extract in the bacterial reverse mutation assay. [JOURNAL ARTICLE] Phytother Res 2009 Oct 13. Abstract | Full Citation | | Chin L, Leung DW, Harry Taylor H Lead chelation to immobilised Symphytum officinale L. (comfrey) root tannins. [JOURNAL ARTICLE] Chemosphere 2009 May 26. Abstract | Full Citation | Find Related Articles | | Giannetti BM, Staiger C, Bulitta M, et al. Efficacy and safety of a Comfrey root extract ointment in the treatment of acute upper or low back pain: results of a double-blind, randomised, placebo-controlled, multi-centre trial. [JOURNAL ARTICLE] Br J Sports Med 2009 May 21. Abstract | Full Citation | Publisher Full Text | Find Related Articles | | Györik S, Stricker H Severe pulmonary hypertension possibly due to pyrrolizidine alkaloids in polyphytotherapy. [Journal Article] Swiss Med Wkly 2009 Apr 4; 139(13-14):210-1. Full Citation | | Gomes MF, de Oliveira Massoco C, Xavier JG, et al. Comfrey (Symphytum Officinale. L.) and Experimental Hepatic Carcinogenesis: A Short-term Carcinogenesis Model Study. [JOURNAL ARTICLE] Evid Based Complement Alternat Med 2007 Dec 26. Abstract | Full Citation | Find Related Articles | | McLean MT Marion's message. Natural healing. [Journal Article] Midwifery Today Int Midwife 2008; (87):9, 64. Full Citation | Find Related Articles | | Cao Y, Colegate SM, Edgar JA Safety assessment of food and herbal products containing hepatotoxic pyrrolizidine alkaloids: interlaboratory consistency and the importance of N-oxide determination. [JOURNAL ARTICLE] Phytochem Anal 2008 Jul 10. Abstract | Full Citation | Find Related Articles | | Sakakura CE, Neto RS, Bellucci M, et al. Influence of homeopathic treatment with comfrey on bone density around titanium implants: a digital subtraction radiography study in rats. [Journal Article, Research Support, Non-U.S. Gov't] Clin Oral Implants Res 2008 Jun; 19(6):624-8. Abstract | Full Citation | Publisher Full Text | Find Related Articles | | Mackinnon M In general practice, 'always expect the unexpected'. [Journal Article] Aust Fam Physician 2008 Apr; 37(4):235-6. Abstract | Full Citation | Find Related Articles |  |
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