The remaining 24 were excluded for the following reasons: (a) the MYH9 variant was also present in other non‐BPD patients; (b) the platelet disorder and/or phenotype was not compatible with MYH9‐RD (e.g., thrombocytosis); (c) the phenotype was explained by the presence of a causal variant in another gene; (d) the MYH9 variant was also identified in an unaffected family member. The gene discussed is MYH9; the disease is Thrombocytosis.