[1] CHATEAU LONGCHAMP, INSERM, U73, F-75016 PARIS, FRANCE
[2] MRC, HUMAN GENET UNIT, EDINBURGH, SCOTLAND
[3] CHILDRENS HOSP MED CTR, DIV GENET, BOSTON, MA 02115 USA
[4] HOSP SICK CHILDREN, DEPT GENET, TORONTO M5G 1X8, ONTARIO, CANADA
[5] NEW YORK STATE DEPT HLTH, ROSWELL PK MEM INST, DEPT HUMAN GENET, BUFFALO, NY 14263 USA
[6] UNIV TEXAS, MD ANDERSON HOSP & TUMOR INST, HOUSTON, TX 77030 USA