APA (7th ed.) Citation

Sun, J., Chen, W., & Xu, H. Association and risk of blood urea nitrogen-to-creatinine ratio with congestive heart failure in critically ill COPD patients. BMC.

Chicago Style (17th ed.) Citation

Sun, Jinjun, Weiwei Chen, and Hongli Xu. Association and Risk of Blood Urea Nitrogen-to-creatinine Ratio with Congestive Heart Failure in Critically Ill COPD Patients. BMC.

MLA (9th ed.) Citation

Sun, Jinjun, et al. Association and Risk of Blood Urea Nitrogen-to-creatinine Ratio with Congestive Heart Failure in Critically Ill COPD Patients. BMC.