1Clinic for Gastroenterology and Gastrointestinal Oncology, Göttingen University, Germany; Zhejiang Institute of TCM and Natural Medicine, Hangzhou, China. Electronic address: kenny.kuchta@med.uni-goettingen.de.
2Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Nagasaki International University, Japan.
3Department of Virology, Institute of Tropical Medicine, Nagasaki University, Japan.
4Department of Pharmaceutical Biology, Leipzig University, Germany.
