An instrumental variable analysis for investigating erythropoietin therapy for treating anaemia among haemodialysis patients Principle investigators: Kate Birnie Organisations: University of Bristol Date approved: 9 October 2017 Project type: UKRR Status: Active UKRR ID: ILD3 View project Date approved: 9 October 2017 Project type: UKRR Status: Active UKRR ID: ILD3