Accuracy of register- and record-based bipolar I disorder diagnoses in Finland; a study of twins

A Danish Twin Study of Manic-Depressive Disorders

1977 • 501 citations

The Genetic Epidemiology of Schizophrenia in a Finnish Twin Cohort

1998 • 452 citations

The Structure of Psychosis

1998 • 248 citations

The Finnish Twin Registry: formation and compilation, questionnaire study, zygosity determination procedures, and research program.

1978 • 231 citations

A Pilot Swedish Twin Study of Affective Illness, Including Hospital- and Population-Ascertained Subsamples

1993 • 139 citations

Schizophrenia in the genetic isolate of Finland

1997 • 120 citations

Age at onset and outcome in schizophrenia are related to the degree of familial loading

1998 • 110 citations

Accuracy of register-based schizophrenia diagnoses in a genetic study

1998 • 98 citations

The treated incidence of psychotic and affective illness in twins compared with population expectation: a study in the Swedish Twin and Psychiatric Registries

1996 • 91 citations

Diagnostic certainty of a voluntary bipolar disorder case registry

1999 • 21 citations