What is the fine-grained topic of the following text: This paper describes the rationale behind the new risk analysis tool and briefly discusses the content given for various chemical groups and how it has been tailored to meet the needs of five user groups: the policy-makers, the incident coordinators, the health care personnel, the responders, and the population. Only return the topic.
Development and usage of the new risk analysis tool for different chemical groups considering five user groups' needs.