1 Department of Oncology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, Shandong, 266003, China.
2 PICC Outpatient Service, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, Shandong, 266003, China.
3 Department of Oncology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, Shandong, 266003, China. Electronic address: tingtingyaolar@126.com.