Fixed ratio or lower limit of normal (LLN) as cut-off value for FEV1/VCPhilip H Quanjer,Jeffrey J Pretto,Carlos A Vaz FragosoRespiratory Medicine(2015)引用 23|浏览7AI 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