The prevalence and incidence estimates were comparable to that of a population‐based study in Olmsted County, Minnesota, USA (Flanagan et al., 2016), which compared the population‐based seroprevalence and seroincidence of AQP4‐IgG autoimmunity among patients with an IDD in two ethnically divergent populations (2003–2011) (Flanagan et al., 2016). The gene discussed is AQP4; the disease is Autoimmunity.