Iselius L, Jagell S
CRC Research Group in Genetic Epidemiology, Southampton General Hospital, Hampshire, U.K.
Clin Genet. 1989 Apr;35(4):272-5. doi: 10.1111/j.1399-0004.1989.tb02942.x.
The distribution of carriers of the gene for Sjögren-Larsson syndrome in Sweden suggests a center of dispersion in the county of Västerbotten in Northern Sweden. The origin of the spread of the gene can be traced back at least 700 years.