“…Mechanisms for network relationships between independently governed provider organisations may be either voluntary or mandated by administrative arrangements, or some combination of the two [19,23]. Managerialist, or 'top down', approaches alone are not always successful in achieving collaboration or integration [19,23,24], with combinations of incentives and guidance producing better results [23]. The prospects for successful non-mandated horizontal relationships, however, rely on alternative mechanisms, including leadership and shared values [25], arrangements for managing relationships and the nature of the environment, including levels of competition [26].…”