Clinical support costs
During the study period, certified physicians and nurses had the opportunity to seek advice from a consultant. The number of questions asked during the StO-study period was multiplied by the number of minutes used by the consultant and the consultant’s wage cost per minute, giving a total cost. This total cost was divided by the number of injections administered during the StO-study period, and this gave the clinical support costs per injection for physicians and nurses, respectively (Table 