Xie, Man, Ya Ting Chen, He Zhang, Hai Tao Zhang, Ke Pan, Xiao Fang Chen, and Xiao Li Xie. “Diagnostic Value of Procalcitonin and Interleukin-6 on Early Postoperative Pneumonia After Adult Cardiac Surgery: A Prospective Observational Study: A Prospective Observational Study”. The Heart Surgery Forum 25, no. 1 (January 13, 2022): E020-E029. Accessed January 21, 2022. https://journal.hsforum.com/index.php/HSF/article/view/4297.