<qa>  What was the name of the reference drug AQUAVAN?This was a randomized, open-label study designed to assess the safety and efficacy of AQUAVAN Injection hereafter referred to as AQUAVAN versus the reference drug, midazolam HCl hereafter referred to as midazolam following pretreatment with fentanyl citrate injection hereafter referred to as fentanyl in producing sedation in male and female patients undergoing single PC procedures. 