PeerJ Author 135 Points Contributions by role Author 135 Contributions by subject area Global Health Surgery and Surgical Specialties Urology Chen Xu PeerJ Author Summary doctor of medicine assocaiate chief physician Global Health Surgery & Surgical Specialties Urology Work details associate chief physician the ninth people,s hospital of suzhou city urology urolithiasis renal cancer PeerJ Contributions Articles 1 February 10, 2020 A retrospective study comparing super-mini percutaneous nephrolithotomy and flexible ureteroscopy for the treatment of 20–30 mm renal stones in obese patients Chen Xu, Rijin Song, Pei Lu, Minjun Jiang, Guohua Zeng, Wei Zhang https://doi.org/10.7717/peerj.8532 PubMed 32095357