You can add an unlimited number of Studies to your Organization. Each Study can contain an unlimited number of Sites and Subjects. The Organization Owner and Team Managers can add new Studies to the Organization.
Each Study can be configured with its own team to maintain focus and privacy. In addition, every Study can be configured with one or more recruiting Sites, each of which can have site-level staff. Site-level staff do not have access to the information and data collected at other Sites.
For more information please refer to: Setting up the Research Portal