[1] UNIV UTRECHT,CTR BIOMEMBRANES & LIPID ENZYMOL,POB 80054,3508 TB UTRECHT,NETHERLANDS
[2] CHILDRENS HOSP,BRUCE LYON MEM RES LAB,OAKLAND,CA
[3] CHILDRENS HOSP,DEPT HEMATOL & ONCOL,OAKLAND,CA
[4] STATE UNIV LIMBURG,CTR BIOMED,DEPT BIOCHEM,6200 MD MAASTRICHT,NETHERLANDS