[1] Inner Mongolia Med Univ, Dept Cardiol, Inner Mongolia Med Coll, Affiliated Hosp 3, Baotou City 014010, Inner Mongolia, Peoples R China
[2] Inner Mongolia Med Univ, Affiliated Hosp, Inner Mongolia Med Univ, Dept Thyroid & Breast Surg, Hohhot 010050, Inner Mongolia, Peoples R China
[3] Inner Mongolia Med Univ, Affiliated Hosp, Dept Orthoped, Hohhot 010050, Inner Mongolia, Peoples R China