Yihai Cao and Sweden Free People Check 

( I'm Yihai Cao)
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Heart hospitalizations may spike days after snowstorms pass - Reuters

www.reuters.com
... days to react to the cold, said Dr. Yihai Cao, a researcher at the Karolinska Institute in Stockholm, Sweden, who wasn't involved in the study.

Doctors in Sweden Document That a Severed Spinal Cord Can...

www.nytimes.com
The study, by Dr. Lars Olson, a professor of neurobiology; Dr. Henrich Cheng, a neurosurgeon; and Dr. Yihai Cao, a molecular biologist,
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