`Spice' and other herbal blends: harmless incense or cannabinoid designer drugs? Auwärter, Volker ; Dresen, Sebastian ; Weinmann, Wolfgang ; Müller, Michael ; Pütz, Michael ; Ferreirós, Nerea Abstract Publication: Journal of Mass Spectrometry Pub Date: May 2009 DOI: 10.1002/jms.1558 Bibcode: 2009JMSp...44..832A