Table 1.

Physical properties of intravenous immunoglobulin (IVIg) preparations used.

Product	Manufacturer	Method of preparation	% IgG	Stabilizing agent
Immunoglobulin i.v.	Sanquin	Cohn's cold ethanol fractionation	> 95%	Glucose
Gammagard S/D	Baxter	Cohn–Oncley-fractionation, ion-exchange, ultrafiltration, chromatography	> 90%	Glucose, glycine, albumin, PEG

IgG, immunoglobulin G; i.v., intravenous; PEG, polyethylene glycol.