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平台:
DOAJ Directory of Open Access Journals
(Available from 2009 until 2020.)
EBSCOhost Academic Search Complete
(Available from 2009/01/01.)
EBSCOhost STM Source
(Available from 2009/01/01.)
PubMed Central Open Access
(Available from 2013 volume: 5 until 2018 volume: 10.)