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平台:
EBSCOhost Business Source Complete
(Available from 1990/03/01 until 2009/09/30.)
EBSCOhost Health Policy Reference Center
(Available from 1990/03/01 until 2009/09/30.)
EBSCOhost OmniFile Full Text Select
(Available from 1995/01/15 until 2009/07/15.)
PubMed Central Open Access
(Available from 1979 volume: 1 until 2009 volume: 31.)