Patients are followed with blood tests every 12 weeks to monitor body functions. They also undergo leukapheresis-a procedure to collect white blood cells-before starting treatment and about 3 to 4 weeks after the fourth vaccine to evaluate how the vaccines affect the action of the immune system cells. For this procedure, blood is drawn through a needle in the arm, similar to donating blood. The blood is processed by a machine that separates and removes the lymphocytes (white blood cells), and the rest of the blood is returned through a needle in the other arm. Patients not receiving the vaccine also undergo leukapheresis to assess their natural response to LMP-2. Some patients may have a biopsy-surgical removal of a small piece of tissue under local anesthetic-of normal skin and tumor or lymph node tissue to examine the vaccine's effects on the tumor immune cells.