[1] Univ Lubeck, Dept Dermatol, Lubeck, Germany
[2] Univ Cologne, Inst Vegetat Physiol, D-50931 Cologne, Germany
[3] Univ Cologne, Ctr Mol Med, D-50931 Cologne, Germany
[4] Hokkaido Univ, Fac Agr, Sapporo, Hokkaido 060, Japan
[5] Univ Bradford, Ctr Skin Sci, Bradford BD7 1DP, W Yorkshire, England