[1] COLUMBIA UNIV COLL PHYS & SURG,DEPT BIOCHEM,NEW YORK,NY 10032
[2] COLUMBIA UNIV COLL PHYS & SURG,DEPT MOLEC BIOPHYS,NEW YORK,NY 10032
[3] COLUMBIA UNIV COLL PHYS & SURG,DEPT NEUROL,NEW YORK,NY 10032
[4] COLUMBIA UNIV COLL PHYS & SURG,DEPT MED,NEW YORK,NY 10032