There could be some biological reasons.

QualityWithoutName · 2008-12-15 11:54:00Z

There could be some biological reasons.简介

来源: QualityWithoutName 于 2008-12-15 11:54:00 [档案] [博客] [旧帖] [给我悄悄话] 本文已被阅读： 0 次 (79 bytes)

回答: Father, daughter and puberty (zt) 由 QualityWithoutName 于 2008-12-15 09:58:21

Another study I posted above clearly considered social economical status (SES).

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