1. Department of Nephrology, Shandong Provincial Hospital Affiliated to Shandong University, 324 Jingwuweiqi Road, Jinan, Shandong 250021, P.R. China
2. Department of General Practice, The Affiliated Hospital of Jining Medical University, 89 Guhuai Road, Jining, Shandong 272000, P.R. China
3. Department of Blood Purification, The Affiliated Hospital of Jining Medical University, 89 Guhuai Road, Jining, Shandong 272000, P.R. China
4. Department of Nephrology, The Affiliated Hospital of Jining Medical University, 89 Guhuai Road, Jining, Shandong 272000, P.R. China
5. High-tech Zone Laboratory of Public Test and Analysis Service, 18-32 Puhe Road, Shenyang 110179, P.R. China