CRP and syphilis: In the ULISSE study, Parisot et al. found that an etiological diagnosis of uveitis was established for 75.7% of patients within the first step of the standardized strategy which included a minimal work-up with non-expensive laboratory investigations (CBC, ESR, CRP, tuberculin skin test, syphilis serology, and chest X-ray) and extra diagnostic tests guided by clinical or paraclinical findings.