Retrieves the permissions to access patients information for a role.
roleName
A System.String specifying the role name for which to get its patients access permissions. This value can be null to retrieve permissions assigned for all roles.
patientId
The patient ID for which permissions are to be retrieved. This value can be null to retrieve permissions for all patients.
extraData
User custom data.
A list of Leadtools.Dicom.Services.DataTypes.RolesPatientsPermission objects specifying the patient's permissions for the specified role(s).