<qa>  What is the name of the procedure that Candidate subjects are excluded if they refuse toRefusal to Undergo Certain Procedures Candidate subjects are excluded if they refuse to undergo certain procedures. These are: 1 IV catheter; 2 electrocardiogram; 3 blood drawing; 4 DNA extraction and storage patients and non-HV controls only; and 5 DNA analysis patients and non-HV controls only. 