Geophagia is nearly universal around the world in tribal and traditional rural societies (although apparently it has not been documented in Japan and Korea).[5] In the ancient world, several writers noted the use of geophagia. Pliny is said to have noted the use of soil on Lemnos, an island of Greece, and the use of the soils from this island was noted until the 14th century.[5][6] The textbook of Hippocrates (460–377 BCE) mentions geophagia, and the famous medical textbook called De Medicina edited by A Cornelius Celsus (14–37 CE) seems to link anaemia to geophagia.[6]