CRP and Crohn disease: A recent study retrospectively analysed the diagnostic accuracy of IBUS‐SAS in 115 CD patients and found a strong correlation of IBUS‐SAS with clinical (Crohn's disease activity index [CDAI]), endoscopic (simple endoscopic score for Crohn's disease [SES‐CD]) and biomarker (faecal calprotectin [FC] and C‐reactive protein [CRP]) activity, with highly significant p values (< 0.001 for all categories).