“…Semi-quantitative determination of the serum immunoglobulins in psoriasis has given more or less conflicting results in the past (Krebs et al, 1963;Laugier and Zimmer, 1963;Laugier et al, 1964;Landau et al, 1965;Petres et al, 1967). Fraser et al (1969, using a simple quantitative gel diffusion technique devised by Fahey and McKelvey (1965), found an increase of the IgA globulin and a decrease of the IgM globulin levels.…”