Hypoxemia

• Luoyang Central Hospital — Luoyang, Henan, China
• Xi'an Central Hospital — Xi'an, Shaanxi, China
• The Second Affiliated Hospital of Xi'an Jiaotong University — Xi'an, Shaanxi, China
• Xi'an People's Hospital — Xi'an, Shaanxi, China

Not specified

Not specified

• The First Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China

• The second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University Wenzhou, Wenzhou, Zhejiang — Zhejiang, China

Not specified

Not specified

• Moscow Multi-disciplinary Clinical Center "Kommunarka" — Moscow, Russia

• Center for Anesthesia and Surgical Intensive Care, Bach Mai Hospital — Hanoi, Vietnam

Not specified