1. Swiss Federal Research Institute WSL; Zürcherstrasse 111 CH 8903 Birmensdorf Switzerland
2. Laboratoire des Sciences du Climat et de L'Environnement; CEA-CNRS-UVSQ F-91191 Gif-sur-Yvette France
3. Laboratory of Tree-Ring Research; Univ. of Arizona; 105 West Stadium Tucson AZ 85721-0058 USA
4. DeLaWi TreeRingAnalyses; Preschlinallee 2 D-51570 Windeck Germany
5. School of GeoSciences; University of Edinburgh; West Mains Road Edinburgh EH93JW UK
6. Forest Ecology Research Unit; TeSAF Department; Univ. degli Studi di Padova; Agripolis Legnaro PD Italy
7. Institute of Wood Science and Technology; Universität für Bodenkultur; Gregor Mendel Strasse 33 A-1180 Vienna Austria
8. Institute for Forest Growth; University of Freiburg; Tennenbacherstrasse 4 79106 Freiburg Germany
9. Slovenian Forestry Institute; Vecna Pot 2 1000 Ljubljana Slovenia
10. Dendrology Department; University of Forestry; Sv. Kliment Ochridski 10 1756 Sofia Bulgaria
11. Universita Politecnica delle Marche; Piazza Roma 22 60121 Ancona Italy
12. Forest Research and Management Institute; ICAS; Sos. Stefanesti 128 O77190 Voluntari Romania
13. Oeschger Center for Climate Change; Zähringerstrasse 25 CH-3012 Bern Switzerland