1. Aalberse RC, Van der Gaag R, Van Leeuwen J (1983) Serologic aspects of IgG4 antibodies I. Prolonged immunization results in an IgG4-restricted response J Immunol 130:722–726
2. Beck OE (1981) Distribution of virus antibody activity among human IgG subclasses. Clin Exp Immunol 43:626–632
3. Carrel S. Morell A, Skvaril F, Barandun S (1972) Human tetanus antibodies: isolation and characterization with special reference to the IgG subclasses. FEBS Lett 19:305–307
4. Craig JP (1971) Choleratoxins In: Kadis S, Montie TC, Ajl SJ (eds) Microbial toxins, vol II A. New York: Academic Press, pp 189–254
5. Finkelstein RA (1962) Vibriocidal antibody inhibition (VAI) analysis: a technique for the identification of the predominant vibriocidal antibodies in serum and for the detection and identification ofVibrio cholerae antigens. J Immunol 89:264–271