Sleep patterns among rural Chinese twin adolescents.
Ouyang F, Lu BS, Wang B, Yang J, Li Z, Wang L, Tang G, Xing H, Xu X, Chervin RD, Zee PC, Wang X.
Ouyang F, et al. Among authors: zee pc.
Sleep Med. 2009 Apr;10(4):479-89. doi: 10.1016/j.sleep.2008.04.011. Epub 2008 Aug 26.
Sleep Med. 2009.
PMID: 18752997
Free PMC article.