Countries such as Australia, Belgium, Canada, Finland, the Netherlands, Norway, Portugal and Sweden have formal mechanisms for making national reimbursement decisions based on an HTA, while in others, including Denmark and Switzerland, an HTA is not part of the formal decision making process (Jonsson and Wilking, 2007). In addition, a sensitivity analysis for uncertainty is not always carried out. Partly due to these differences, findings are not always consistent across studies.