NATO Advanced Study Institute on Vascular Endothelium: Receptors and Transduction Mechanisms (1988 : Porto Karras, Chalkidikē, Greece) (Porto Carras, Greece)
NATO Advanced Research Workshop on the Changing Visual System: From Early to Late Stages of Life--Maturation and Aging in the Central Nervous System (1991 : San Martino al Cimino, Italy)