[1] Klin & Poliklin Kinderheilkunde, Munster, Germany
[2] Univ Munster, Inst Phamazeut & Med Chem, D-4400 Munster, Germany
[3] Univ Marburg, Inst Physiol, Marburg, Germany
[4] Univ Munster, Koordinierungs Zentrum Klin Studien, D-4400 Munster, Germany