1. IgG4 subclass deficiency syndromes;Heiner;Monogr. Allergy
2. Selective immunoglobulin G4 deficiency and recurrent infections of the respiratory tract;Beck;Am. Rev. Resp. Dis.,1981
3. Deficiency of IgG4: a disorder associated with frequent infections and bronchiectasis that may be familial;Heiner;Clin. Rev. Allergy,1983
4. Increased serum IgG4 levels in acute Epstein-Barr viral mononucleosis;Shacks;Ann. Allergy,1985
5. Local production of IgG4 in human colostrum;Keller;J. Immunol.,1983