Traditional Chinese medicine and sports drug testing: identification of natural steroid administration in doping control urine samples resulting from musk (pod) extracts - Thevis, M.; Schänzer, W.; Geyer, H.; Thieme, D.; Grosse, J.; Rautenberg, C.; Flenker, U.; Beuck, S.; Thomas, A.; Holland, R.; Dvorak, J. (British Journal of Sports Medicine, 2013)