The 30 organizations were from diverse sectors such as banking, healthcare, social services, energy-supply, software maintenance, automotive manufacturing, internet services, food manufacturing and distribution, IT and ICT. A minimum of 10 employees within each of the 30 organizations have been randomly addressed by the contact person (some contact person chose the employees randomly, but within one department). Within small organizations random assignment was not possible. Among the 389 questionnaires that have been send to employees, 249 employees returned their questionnaire (response rate = 64% among those 30 organizations). The data of 26 employees had to be excluded due to more than 91% of missing data, leaving the information from 223 employees.