[1] Genzyme Genet, Santa Fe, NM USA
[2] Univ Maryland, Sch Med, Baltimore, MD 21201 USA
[3] Spectrum Hlth Genet Serv, Grand Rapids, MI USA
[4] Henry Ford Hosp, Detroit, MI 48202 USA
[5] Amer Coll Med Genet, Bethesda, MD USA
[6] Gundersen Lutheran Med Ctr, La Crosse, WI USA