Understanding Gut Symptoms in People With Cystic Fibrosis

"The investigators will conduct a longitudinal study comprising nested groups A to C of the study population, with progressively more detailed mechanistic investigations. No control group.~Group A will complete a CF-specific measure of gut symptoms (CFAbd-Score), a generic constipation score (PAC-SYM) and 24 hour dietary recall (Intake24).~Group B will have stool and blood for microbiome, inflammatory mediators and faecal fat.~Group C will have gut MRI and exploratory studies of inflammation."