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Message-ID: <CAKRWT8_sNMG6Ao5uAGUHPpoWOswQAwOjVWnJHF2F2cgB2kjdUw@mail.gmail.com>
Date: 2013-02-23T19:15:44Z
From: Xiaogang Su
Subject: Selecting First Incidence from Longitudinal Data
In-Reply-To: <51291389.2010101@sapo.pt>

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