[1] Case Western Reserve Univ, Dept Pediat, Cleveland, OH 44106 USA
[2] Amgen, Dept Neurosci, Thousand Oaks, CA 91320 USA
[3] Univ Alabama, Dept Cell Biol, Birmingham, AL 35294 USA
[4] Childrens Hosp, Med Ctr, Div Pulm Biol, Cincinnati, OH 45229 USA
[5] Univ Tennessee, Program Microscopy, Knoxville, TN 37996 USA
[6] Parke Davis Lab Mol Genet, Alameda, CA 94502 USA