Cao Yihai. Photo: Ulf Sirborn.
![](https://mb.cision.com/Public/206/2425986/89149babe377d52c_800x800ar.jpg)
Photographer: Ulf Sirborn
Cao Yihai. Photo: Ulf Sirborn.Photographer: Ulf Sirborn
Cao Yihai. Photo: Ulf Sirborn.KAROLINSKA INSTITUTET PRESS OFFICE Opening hours: Monday–Friday 09.00–17.00 CET. Karolinska Institutet – a medical university ki.se