Application of quality control circle activities in improving the quality of subcutaneous anticoagulant injection (提高抗凝剂皮下注射规范率的品管圈实践) oleh FAN Ningning (樊宁宁), TUO Huanhuan (拓焕焕), CHEN Wenwen (陈雯雯), CAI Huixia (蔡会霞), SHI Yali (石雅莉), XU Yuanle (许远乐)