Hansen T , Skytthe A , Stenager E , Petersen HC , Brønnum-Hansen H , Kyvik KO.Concordance for multiple sclerosis in Danish twins: an update of a nationwide study . Mult Scler2005; 11: 504-510 .
2.
Hansen T , Skytthe A , Stenager E , Pedersen HC , Kyvik KO , Brønnum-Hansen H.Risk for multiple sclerosis in dizygotic and monozygotic twins . Mult Scler2005; 11: 500-503 .
3.
Hyllested K.Disseminated sclerosis in Denmark: prevalence and geographical distribution. Copenhagen: J. Jørgensen , 1956.
4.
Ebers GC , Bulman DE , Sadovnick AD , Paty D , Warren S , Hader Wet al.A population-based study of multiple sclerosis in twins . New Engl J Med1986; 315: 1638-1642 .
5.
Sadovnick AD , Armstrong H , Rice GPA , Bulman D , Hashimoto L , Paty Det al.A population-based study of multiple sclerosis in twins: update . Ann Neurol1993; 33: 281-285 .
6.
Willer CJ , Dyment DA , Risch NJ , Sadovnick AD , Ebers GC and he Canadian Collaborative Study Group . Twin concordance and sibling recurrence rates in multiple sclerosis . Proc Natl Acad Sci2003; 100: 12877-12882 .
7.
Kinnunen E , Koskenvuo M , Kaprio J , Aho K.Multiple sclerosis in a nationwide series of twins . Neurology1987; 37: 1627-1629 .
8.
French Research Group on Multiple Sclerosis . Multiple sclerosis in 54 twinships: concordance rate is independent of zygosity . Ann Neurol1992; 32: 724-727 .
9.
Mumford CJ , Wood NW , Kellar-Wood H , Thorpe JW , Miller DH , Compston DA.The British Isles survey of multiple sclerosis in twins . Neurology1994; 44: 11-15 .
10.
Risch N , Spiker D , Lotspeich L , Nouri N , Hinds D , Hallmayer Jet al.A genomic screen of autism: evidence for a multilocus etiology . Am J Hum Genet1999; 65: 493-507 .
11.
Little CC.The genetics of tissue transplantation in mammals . J Cancer Res1924; 8: 75-95 .
12.
Hall JG , Lopez-Rangel E.Twins and twinning. In Rimoin DL , Connor JM , Pyeritz RE eds. Emery and Rimoin’s principles and practice of medical genetics: vol 1, third edition. New York: Churchill Livingstone , 1996: 395-404.