Fraser, Simon DS, Barker, Jenny, Roderick, Paul J, Yuen, Ho Ming, Shardlow, Adam, Morris, James E, McIntyre, Natasha J, Fluck, Richard J, McIntyre, Chris W, Taal, Maarten W, "Health-related quality of life, functional impairment and comorbidity in people with mild-to-moderate chronic kidney disease: a cross-sectional study", BMJ Open, 2020