[1] Qiqihar Med Univ, Dept Med Examinat, Affiliated Hosp 3, Qiqihar 161000, Peoples R China
[2] Qiqihar Med Univ, Dept Intens Care Med, Affiliated Hosp 3, Qiqihar 161000, Peoples R China
[3] Qiqihar Med Univ, Ward 2, Dept Neurol, Affiliated Hosp 3, Qiqihar 161000, Peoples R China
[4] Qiqihar Med Univ, Dept Nursing, Affiliated Hosp 3, Qiqihar 161000, Peoples R China
[5] Qiqihar Med Univ, Dept Geriatr, Affiliated Hosp 3, Qiqihar 161000, Peoples R China
[6] Qiqihar Med Univ, Gen Practice Ward, Affiliated Hosp 3, Qiqihar 161000, Peoples R China
[7] Qiqihar Med Univ, Honorable Community, Affiliated Hosp 3, Qiqihar 161000, Peoples R China