[1] Wellcome Trust Sanger Inst, Hinxton, England
[2] Univ Oxford, Oxford, England
[3] Kings Coll London, London WC2R 2LS, England
[4] Univ Southampton, Southampton, Hants, England
[5] Univ Nottingham, Nottingham NG7 2RD, England
[6] Newcastle Univ, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[7] Univ Manchester, Manchester, Lancs, England
[8] Univ Edinburgh, Edinburgh, Midlothian, Scotland
[9] Univ Sheffield, Sheffield, S Yorkshire, England
[10] Univ Rio A Coruna, La Coruna, Spain
[11] Boston Univ, Boston, MA 02215 USA
[12] Univ Ioannina, GR-45110 Ioannina, Greece
[13] Univ Rio Santiago, Santiago De Compostela, Spain
[14] Erasmus MC, Rotterdam, Netherlands
[15] DeCODE Genet, Reykjavik, Iceland
[16] Royal Natl Orthopaed Hosp, Stanmore HA7 4LP, Middx, England
[17] Leiden Univ, Med Ctr, Leiden, Netherlands
[18] Univ Calif, Sacramento, CA USA
[19] Feinstein Inst Med Res, Manhasset, NY USA
[20] Univ Calif San Francisco, San Francisco, CA 94143 USA
[21] Calif Pacific Med Ctr, San Francisco, CA USA
[22] Univ Cantabria, E-39005 Santander, Spain
[23] Hosp UM Valdecilla, Santander, Spain
[24] Univ Thessaly, Larisa, Greece
[25] Univ Pittsburgh, Pittsburgh, PA USA