GEEITEMA and DEMAP were the only Spanish groups taking part in the European-wide project EUROHEIS . In addition to this joint project, some DEMAP members also collaborated in the study on mortality due to cerebrovascular disease and water hardness, led by researchers from GEEITEMA. The outcomes are described in the paper entitled “Spatial analysis of the relationship between mortality from cardiovascular and cerebrovascular disease and drinking water hardness. Environmental Health Perspectives 2004; 112(9): 1037-1044” which is included in the publications link on this web site.