[1] Zhengzhou Univ, Acad Med Sci, Zhengzhou, Henan, Peoples R China
[2] Zhengzhou Univ, Sch Nursing & Hlth, Zhengzhou, Henan, Peoples R China
[3] Univ Roma Tor Vergata, Dept Biomed & Prevent, Rome, Italy
[4] Wroclaw Med Univ, Dept Nursing & Obstet, Wroclaw, Poland
[5] Zhengzhou Univ, Sch Nursing & Hlth, 100 Kexue Ave, Zhengzhou 450001, Henan, Peoples R China