1. BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87 12205 Berlin Germany
2. International Center for Numerical Methods in Engineering (CIMNE); Building C1, Campus North UPC, C/ Gran Capita s/n 08034 Barcelona Spain
3. National Institute of Standards and Technology (NIST); Fire Research Division; 100 Bureau Drive, Stop 8665 Gaithersburg MD 20899-8665 USA
4. Catalan Institution for Research and Advanced Studies (ICREA); Passeig Lluís Companys, 23 08010 Barcelona Spain