APA (7th ed.) Citation

Ruan, Z., Tian, H., Li, R., Zhang, J., Cao, S., Yang, Z., . . . Miao, Q. Joint association of frailty index and biological age with chronic obstructive pulmonary disease: A cohort study from CHARLS. Nature Portfolio.

Chicago Style (17th ed.) Citation

Ruan, Zhishen, Hongyan Tian, Rui Li, Jinzhi Zhang, Sheng Cao, Zi Yang, Xinyan Chen, Dan Li, and Qing Miao. Joint Association of Frailty Index and Biological Age with Chronic Obstructive Pulmonary Disease: A Cohort Study from CHARLS. Nature Portfolio.

MLA (9th ed.) Citation

Ruan, Zhishen, et al. Joint Association of Frailty Index and Biological Age with Chronic Obstructive Pulmonary Disease: A Cohort Study from CHARLS. Nature Portfolio.