PeerJ Author 135 Points Contributions by role Author 135 Contributions by subject area Dentistry Science and Medical Education Yamei Xu PeerJ Author Summary Dentistry Science & Medical Education PeerJ Contributions Articles 1 January 16, 2020 Application of problem-based learning and case-based learning integrated method in the teaching of maxillary sinus floor augmentation in implant dentistry Yunfei Liu, Yamei Xu, Yueheng Li, Qingqing Wu https://doi.org/10.7717/peerj.8353 PubMed 31988803