Research on reducing safrole and aristolochic acid A in Asari Radix et Rhizoma based on different processing techniques Quantitative determination of seven major absorbed volatile constituents in mice brain, liver and blood after intragastric administration of Asari Radix et Rhizoma suspension by headspace-solid phase microextraction-gas chromatography-mass spectrometry Study on analgesic effects of aqueous extract from Asari Radix et Rhizoma combined with Nimodipine and its mechanism Research on inorganic elements of Asari Radix et Rhizoma from different localities and species Metabolomic studies on special processing of Asari Radix et Rhizoma in Guilingji