- Astrophysics Research, Northwestern University
- Center for Gravitational Wave Physics, Penn State University
- Center for Gravitation and Cosmology, University of Wisconsin - Milwaukee
- Center for Relativity, University of Texas at Austin
- Cornell Astrophysics and Relativity Group
- General Relativity Group, University of Southampton
- Hyperspace at UBC, University of British Columbia
- NCSA relativity group, International Numerical Relativity Group
- Pittsburgh Relativity Group, University of Pittsburgh
- QMW Relativity Group, University of London
- Relativistic Astrophysics Group, University of Florida
- WUGRAV Gravity Group, Washington University
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