The tendency of a group to recruit only others in the same group (homophily for key variables) among new injectors in Tallinn, Estonia (in 2009, 2011, 2013).
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The tendency of a group to recruit only others in the same group (homophily for key variables) among new injectors in Tallinn, Estonia (in 2009, 2011, 2013).
创建时间：
2017-02-03
