Developing a patient portal for haematology patients requires involvement of all stakeholders and a customised design, tailored to the individual needs. - Paul A. F. Geerts; Trudy van der Weijden; Pien G. M. Loeffen; Lise E. F. Janssen; Celine Almekinders; Tobias A. Wienhold; Gerard M. J. Bos (BMC Medical Informatics Decis. Mak., 2019)