[1] UNIV MINNESOTA, SCH MED, DEPT LAB MED & PATHOL, MINNEAPOLIS, MN 55455 USA
[2] STANFORD UNIV, MED CTR, SCH MED, DIV NEPHROL, STANFORD, CA 94305 USA
[3] GUYS HOSP, SCH MED, METAB MED UNIT, LONDON SE1 9RT, ENGLAND
[4] SUNY DOWNSTATE MED CTR, DIV NEPHROL, BROOKLYN, NY 11203 USA
[5] NIELS STEENSENS HOSP, GENTOFTE, DENMARK
[6] NEW ENGLAND MED CTR HOSP, DIV NEPHROL, BOSTON, MA USA
[7] HILLEROD CENT HOSP, HILLEROD, DENMARK
[8] UNIV MINNESOTA, SCH MED, DIV PEDIAT NEPHROL, MINNEAPOLIS, MN 55455 USA
[9] AARHUS UNIV, INST PATHOL, STEREOL & ELECTRON MICROSCOP LAB DIABET RES, DK-8000 AARHUS, DENMARK
[10] HVIDORE HOSP, KLAMPENBORG, DENMARK