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平台:
DOAJ Directory of Open Access Journals
(Available from 2006.)
EBSCOhost Academic Search Complete
(Available from 2009/09/01.)
EBSCOhost STM Source
(Available from 2009/03/01.)
MDPI - Multidisciplinary Digital Publishing Institute
(Available from 2016 volume: 84 issue: 3.)
PubMed Central Open Access
(Available from 2010 volume: 78 until 2018 volume: 86.)