CD40LG and toxoplasmosis: Systemic workup including antinuclear antibodies, antidouble-stranded DNA, antineutrophilic cytoplasmic antibodies, rheumatoid factor, IgG4, angiotensin-converting enzyme serum lysozyme, T-SPOT, Mycoplasma pneumoniae antibody, toxoplasmosis IgG and IgM, Epstein-Barr virus-viral capsid antigen IgG and IgM, IgG and IgM of varicella-zoster virus and herpes simplex virus, angiotensin converting enzyme, lysozyme, myeroperoxidase and proteinase3 ANCA, antiSS-A/Ro, antiSS-B/La, antiU1-ribonucleoprotein antibody, and soluble interleukin-2 receptor were all unremarkable.