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Provinces targeted for the eight surveys in 2008−2011 marked with “▴” for those in Northern China or “▾” for those in Southern China.

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posted on 21.12.2012, 00:06 by Wenming Jiang, Shuo Liu, Guangyu Hou, Jinping Li, Qingye Zhuang, Suchun Wang, Peng Zhang, Jiming Chen

Provinces targeted for the eight surveys in 2008−2011 marked with “▴” for those in Northern China or “▾” for those in Southern China.

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