Immunoglobulin A holds great allure for some researchers. Tattooing holds great allure for other researchers. For three researchers, the combination of immunoglobulin A and tattooing is worth writing a paper about. That paper is: “Tattooing to ‘Toughen Up’: Tattoo Experience and Secretory Immunoglobulin A,” Christopher D. Lynn [pictured here, sitting in a chair], Johnna T. […]