Sergei A. Snopov,1,* Len Roza,2 Frank R. de Gruijl 3
1 Institute of Cytology RAS, St. Petersburg, Russia, 2 Department of Nutritional
Physiology, TNO Nutrition and Food Research, Zeist, The Netherlands, and 3 Department of Dermatology,
Leiden University Medical Center, Leiden, The Netherlands;
* e-mail: snopov@mail.cytspb.rssi.ru