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Lipstick use has been hypothesized to be a risk factor of developing systemic lupus erythematosus (SLE). The objective of this study was to investigate the association between lipstick use and risk of SLE. We performed an Internet-based case–control study of SLE with Google™ users searching on medical key terms as the source population. Cases were diagnosed within 5 years and met ≥4 ACR criteria for...
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