Protection for national products of geographical indication of geo-authentic crude drug Radix Codonopsis Advances in studies on quality evaluation of Radix Codonopsis An overview of research on germplasm resources of Radix Codonopsis and their utilization Comparison of Radix Codonopsis and Radix Astragali on ECG of experimental myocardial ischemia rats Comparison of Radix Codonopsis and Radix Astragali on central nervous system Macrological Identification of Chinese Drug Dangshen (Radix Codonopsis)