The activity of the willow bark extract, STW 33-I, can not be explained solely on the basis of its salicin content, 2003, Short lecture - Khayyal, MT; El-Ghazaly, MA; Okpanyi, SN (Gesellschaft für Arzneipflanzenforschung (GA))
51. annual congress, Kiel, 31.08.-03.09.2003.