Separation of the samples by PCP IgA and IgM concentrations of 150 U/mL and 20 U/mL respectively [3] significantly changed the number of individuals within each phenotypic group (high PCP IgM only>Low PCP IgM and IgA>High PCP IgM and IgA>High PCP IgA only). The gene discussed is CD40LG; the disease is pneumocystosis.