1. Division of Clinical Pharmacology; Service of Biomedicine, Department of Laboratory; Centre Hospitalier Universitaire Vaudois and University of Lausanne; Lausanne Switzerland
2. School of Pharmaceutical Sciences; University of Geneva, University of Lausanne; Geneva Switzerland
3. Service of Neonatology; Department of Paediatrics; Centre Hospitalier Universitaire Vaudois and University of Lausanne; Lausanne Switzerland
4. Clinical Chemistry Laboratory; Service of Biomedicine; Centre Hospitalier Universitaire Vaudois and University of Lausanne; Lausanne Switzerland