Ethanol extract from birch bark (Betula pubescens) suppresses human dendritic cell mediated Th1 responses and directs it towards a Th17 regulatory response in vitro - Freysdottir, J; Sigurpalsson, M B; Omarsdottir, S; Olafsdottir, E S; Vikingsson, A; Hardardottir, I (Immunol Lett, 2011)