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平台:
DOAJ Directory of Open Access Journals
(Available from 2007.)
Elsevier SD Journals - AutoHoldings
(Available from 2014 volume: 50 issue: 1 until 2017 volume: 53 issue: 6.)
MDPI - Multidisciplinary Digital Publishing Institute
(Available from 2018 volume: 54 issue: 1.)
PubMed Central
(Available from 2018 volume: 54.)