<qa>  What is the current safety and efficacy study of imiquimod 5 cream in theThe current safety and efficacy study of imiquimod 5 cream in the treatment of nodular basal cell carcinoma nBCC will use a composite endpoint including both a clinical visual assessment of the target tumor site and a histological evaluation of an excisional surgery taken from the target tumor site for primary assessment of complete tumor clearance 8 weeks post treatment. 