[1] Univ Regensburg, Med Ctr, D-8400 Regensburg, Germany
[2] Sch Lab & Clin Sci, Newcastle Upon Tyne, Tyne & Wear, England
[3] Med Univ Vienna, Vienna, Austria
[4] Univ Freiburg, Med Ctr, Freiburg, Germany
[5] Hop St Louis, Paris, France
[6] Univ Rostock, Med Ctr, Rostock, Germany
[7] Univ Newcastle Upon Tyne, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England