Affiliation: | 1. Cancer Center, The Fourth Hospital of China Medical University, Shenyang, China 2. Department of Emergency Surgery, The Fourth Hospital of China Medical University, Shenyang, China 3. Department of Anesthesiology, The Fourth Hospital of China Medical University, Shenyang, China 4. Department of Gastrointestinal Surgery, The Fourth Hospital of China Medical University, Chongshan East Road 4, Shenyang, 110032, Liaoning, China
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