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Zhang, Pingping, Qiuxia Li, Qiujing Wei, Zetao Liao, Zhiming Lin, Linkai Fang, a Jieruo Gu. "Serum Vitamin D and Pyridinoline Cross-Linked Carboxyterminal Telopeptide of Type I Collagen in Patients With Ankylosing Spondylitis." Biomed Res Int 2015.

Zhang, Pingping, et al. "Serum Vitamin D and Pyridinoline Cross-Linked Carboxyterminal Telopeptide of Type I Collagen in Patients With Ankylosing Spondylitis." Biomed Res Int 2015.