Other twin research

• Kings College London
• The Centre for the Study of Multiple Birth
• The Finnish Twin Cohort Study
• Minnesota Center for Twin and Family Research
• The Twins Foundation
• The Queensland Institute of Medical Research
• Institute of Behavioral Genetics, University of Colorado
• International Society of Twin Studies
• Virginia Institute for Psychiatric and Behavioral Genetics
• Wisconsin Twin Research
• Bielefeld University

Twin registries of the world

Brazil: The Brazilian Twin Registry

Denmark: Danish Twin Registry

Finland: The Finnish Twin Cohort Study

Guinea-Bissau: Bandim Health Project

Hungary: Hungarian Twin Registry

Israel: The Longitudinal Israeli Study of Twins

Italy: Italian Twin Register

Japan: Keio Twin Registry (aka Tokyo Twin Cohort Project)
           Center for Twin Research, Osaka University Graduate School of Medicine

Netherlands: Netherlands Twin Registry

Norway: Norwegian Twin Registry

Spain: The Murcia Twin Registry

Sri Lanka: Sri Lankan Twin Registry

Sweden: Swedish Twin Registry

United Kingdom: TwinsUK

U.S.A: California Twin Program
            Florida State Twin Registry (FSTR)
            Michigan State University Twin Registry
            Mid-Atlantic Twin Registry (MATR)
            Minnesota Twin Registry
            NAS-NRC Twin Registry
            Northern California Twin Registry
            Pittsburgh Registry of Infant Multiplets (PRIM)
            The Southern California Twin Project
            Washington State Twin Registry
            Vietnam Era Twin Registry