[1] UNIV MICHIGAN, DEPT PSYCHIAT, ANN ARBOR, MI 48109 USA
[2] UNIV MICHIGAN, DEPT HUMAN GENET, ANN ARBOR, MI 48109 USA
[3] DUKE UNIV, HOWARD HUGHES MED INST, DURHAM, NC USA
[4] DUKE UNIV, DEPT BIOCHEM, DURHAM, NC USA
[5] DUKE UNIV, DEPT CELL BIOL, DURHAM, NC USA
[6] UNIV MICHIGAN, DEPT ANAT & CELL BIOL, ANN ARBOR, MI 48109 USA
[7] GENETHON, EVRY, FRANCE