From the *Institute of Mental Health, Tianjin Anding Hospital, Tianjin; and †Department of Orthopedics, Shuangyashan Coal General Hospital, Shuangyashan, Heilongjiang Province, China.
Received September 27, 2014; accepted after revision April 29, 2015.
Reprints: Jian-Li Yang, MD, PhD, Institute of Mental Health, Tianjin Anding Hospital, 13, Liu Lin Rd, Hexi District, Tianjin 300222, China (e-mail: [email protected]).
Supported by the National Natural Science Foundation of China (No. 30870895).
J.J.Y., L.B.P., and J.L.Y. were responsible for the conception and design of the work, and drafting the article and revising it critically for important intellectual content; J.J.Y., Y.Z., and Z.Y.W., acquisition and interpretation of data; and J.J.Y., L.B.P., Y.Z., Z.Y.W., and J.L.Y., final approval of the version to be published.