[1] Army Med Univ, Southwest Hosp, Dept Nursing, Chongqing 400038, Peoples R China
[2] Army Med Univ, Southwest Hosp, Dept Radiol, Chongqing 400038, Peoples R China
[3] Army Med Univ, Southwest Hosp, Dept Geriatr, Chongqing 400038, Peoples R China
[4] Army Med Univ, Southwest Hosp, Dept Nephrol, Chongqing 400038, Peoples R China
[5] Army Med Univ, Southwest Hosp, Dept Cardiol, Chongqing 400038, Peoples R China