[1] CLIN RES CTR, MRC, PAEDIAT RES GRP, WATFORD RD, HARROW HA1 3UJ, MIDDX, ENGLAND
[2] DUKE UNIV, MED CTR, DIV PEDIAT METAB, DURHAM, NC 27710 USA
[3] CASE WESTERN RESERVE UNIV, SCH MED, VET ADM MED CTR, DEPT PHARMACOL, CLEVELAND, OH 44106 USA
[4] CASE WESTERN RESERVE UNIV, SCH MED, DEPT MED, CLEVELAND, OH 44106 USA
[5] UNIV N CAROLINA, DEPT ENVIRONM HLTH SCI & ENGN, CHAPEL HILL, NC 27514 USA