1. Department of Paediatrics; Clinical and Molecular Haemostasis and Immunodeficiency; University Hospital Frankfurt; Frankfurt am Main Germany
2. Department of Pediatrics; Aflac Cancer and Blood Disorders Center; Children's Healthcare of Atlanta and Emory University; Atlanta GA USA
3. Department of Biostatistics; Rho Inc.; Chapel Hill NC USA
4. Centre for Thrombosis and Haemostasis; Lund University; Skåne University Hospital; Malmö Sweden