Immunomodulatory effect of bergenin and norbergenin against adjuvant-induced arthritis—A flow cytometric study Nighat Nazira, Surrinder Koulb, Mushtaq A. Qurishia, Sachin C. Tanejab, Sheikh F. Ahmadc, Sarang Banic and Ghulam N. Qazi, Journal of Ethnopharmacology, Volume 112, Issue 2, 13 June 2007, pp. 401-405, doi:10.1016/j.jep.2007.02.023