An international patient-centred study of retroperitoneal fibrosis Authors:R Dattani, T D Barwick, G El Wardany, N Gibbons, J C Mason, P Morgan, C D Pusey, F W K Tam, J A P Tomlinson and RaDaR Rare Disease Group (RDG) Year: 2022 Journal: QJM Database: RaDaR Read paper Year: 2022 Journal: QJM Database: RaDaR