Inside a control cohort of 27 PSC individuals from Oxford with elevated serum IgG4 ( 1.4 g/L) and no histological evidence of IAC, the percentage of blue\collar workers was 22%. in IgG4\RD. As it was our medical impression that blue\collar workers were dominating our cohort of IAC individuals, we hypothesized that chronic occupational antigen exposure … Continue reading Inside a control cohort of 27 PSC individuals from Oxford with elevated serum IgG4 ( 1