Riitta-Maija Hämäläinen & the ENWHP network: Anja Dijkman Ása Guðbjörg Ásgeirsdóttir Karla Van den Broek Theodor Haratau Karl Kuhn Giuseppe Masanotti Jacek Pyzalski Arjella van Scheppingen Maria Dolores Solé Matti Ylikoski Finnish Institute of Occupational Health Value of Partnership for Workplace Health Promotion - Guideline for Partnership Building .