[1] Univ Med Ctr Goettingen, Dept Clin Chem, D-37075 Gottingen, Germany
[2] Univ Barcelona, Dept Pharmacol & Toxicol, Biomed Diagnost Ctr, Hosp Clin Barcelona, Barcelona, Spain
[3] Cylex, Columbia, MD USA
[4] Cincinnati Childrens Hosp, Div Clin Pharmacol, Med Ctr, Cincinnati, OH USA
[5] Univ Cincinnati, Dept Pediat, Cincinnati, OH 45221 USA
[6] St Luc Univ Hosp, Dept Clin Chem, St Luc, Belgium