For blinding purposes, at each infusion, all patients will receive a total volume of 4 ml/kg bw. For patients receiving 0.2 g/kg bw of IGIV-C, the final volume of 4 ml/kg bw will be adjusted by the addition of dextrose 5%. Placebo will be supplied as Albumin 5% or Albumin 25% and diluted with either dextrose 5% or saline to a final concentration of 0.1% albumin.