From a traditional medicinal plant to a rational drug: understanding the clinically proven wound healing efficacy of birch bark extract. oleh Sandra Ebeling, Katrin Naumann, Simone Pollok, Tina Wardecki, Sabine Vidal-Y-Sy, Juliana M Nascimento, Melanie Boerries, Gudula Schmidt, Johanna M Brandner, Irmgard Merfort