Severe perineal tear among primiparous women in the early 21 st Century: time trend, changing risk factors and clinical practice in maternity care
BJOG-AN INTERNATIONAL JOURNAL OF OBSTETRICS AND GYNAECOLOGY(2018)
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要