1. Naturalis Biodiversity Center and Leiden University, PO Box 9514, 2300 RA Leiden, The Netherlands
2. Research Fellow, FFPRI, Tsukuba, Ibaraki, Japan
3. Formerly of Dokkyo University, Soka, Saitama 340-0042, Japan
4. CNRS-CRCAO, East Asian Civilization Research Centre, 52 Rue du Cardinal Lemoine, 75005 Paris, France
5. Center for Obsidian and Lithic Studies, Meiji University, Kanda-sarugaku-cho 1-6-3, Chiyoda, Tokyo 101-0064, Japan
6. Formerly Curator of the Herbarium, Naturalis Biodiversity Center, PO Box 9514, 2300 RA Leiden, The Netherlands