Erratum to: Diagnosis and treatment of patients with antiphospholipid syndrome: a mixed-method evaluation of care in The Netherlands. Issue 2 (21st June 2021) - Klein Haneveld, Mirthe J; Lemmen, Caro H C; Brunekreef, Tammo E; Bijl, Marc; Jansen, A J Gerard; de Leeuw, Karina; Spierings, Julia; Limper, Maarten; ,