仅看该教授2019年发的3篇论文，就都是开源期刊收费的，巨额费用，一篇3300美元，一篇4100美元，一篇3700美元，这三个杂志在相应官网上都可以查到明码标价，网址为：
https://authorservices.wiley.com/author-resources/Journal-Authors/open-access/article-publication-charges.html。有兴趣的朋友可以上去看看，而且人家是做成了EXCEll清单表格的，价格一览俱全。当然，某刘教授可以提供证据证明她有特权（文章质量好也可以是特权）可以不付费用也是可以的。列表如下：Liu, Huiying, et al. "Continued social participation protects against depressive symptoms across the retirement transition: Longitudinal evidence from three waves of the China Health and Retirement Longitudinal Survey." Geriatrics & Gerontology International (2019). 1– 5. https://doi.org/10.1111/ggi.13752
《国际老年医学与老年病学》，大类是医学，小类是老年医学期刊
Liu, Huiying, and Vivian WQ Lou. "Functional recovery of older stroke patients discharged from hospital to home: The effects of cognitive status and different levels of therapy intensity." Journal of clinical nursing 28.1-2 (2019): 47-55.
《临床护理杂志》，大类是医学，小类属于护理学。
半月刊
Liu, Huiying, et al. "The relationship between comorbidities in dementia patients and burden on adult–child primary caregivers: Does having a secondary caregiver matter?" International journal of mental health nursing (2019). doi:10.1111/inm.12640
《国际精神健康护理杂志》，大类医学，小类精神病学
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