1. Max Planck Institute for the Science of Human History; Jena Germany
2. Research Laboratory for Archaeology and the History of Art; School of Archaeology; University of Oxford; Oxford UK
3. Smithsonian Conservation Biology Institute; Conservation Ecology Center; Front Royal Washington D.C.
4. National Institute of Fundamental Studies; Kandy Sri Lanka
5. Department of History and Archaeology; University of Sri Jayewardenepura; Gangodawila Nugegoda Sri Lanka