NPPB and congestive heart failure: Twelve trials assessed the serum NT-proBNP of CHF patients, 5 (Huang et al., 2013; Zhang, 2015; Fan et al., 2017; Quan and Miu, 2017; Ye et al., 2017) and 6 (Yang et al., 2014; Yang M. et al., 2015; Yuan et al., 2015; Li et al., 2016; Shen et al., 2017; Wang, 2017) of which measured with the unit of ng/L and pg/mL, respectively, 1 of which adopted ng/mL (Wu, 2015).