[1] Heidelberg Univ, Med Fac Mannheim, Mannheim, Germany
[2] ELN Fdn, Weinheim, Germany
[3] Inst Human Virol, Baltimore, MD USA
[4] Onkol Frankfurt, Frankfurt, Germany
[5] Tubingen Univ, Tubingen, Germany
[6] Imperial Coll, London, England
[7] Hamburg Univ, Hamburg, Germany