Dr. Lesley Tilson:

There are a number of steps within the health technology assessment, HTA, process, and we are participating in joint assessments for relative effectiveness assessment, which is based on scientific evidence, including clinical trials. When we go a step further, to the full HTA process, it can be much more complex. For example, the standard of care and health system delivery here can be different to other countries and that can affect the cost effectiveness result, leading to different conclusions.