Structural characteristics of China's COVID-19 patent cooperation network at the province, city, and patent applicant levels.

Front Public Health · 2022 · PMC9452781 · PMID 36091539

Europe PMC DOI

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a decreasing trendno p-value reported

The findings are as follows: First, the inter-regional cooperation level in China's COVID-19 patent cooperation network shows a decreasing trend from eastern to central to western regions.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.