WNK2 and pneumonia: Similar to ECG, Poria cocos can relieve cough as an expectorant by targeting nuclear factor-κB, mitogen-activated protein kinase, and TGFRII signaling pathway (Hu et al., 2021b; Gui et al., 2021; Lu et al., 2021), whereas Pinellia and Schisandra chinensis perform similar roles in pneumonia by participating in various regulatory pathways in animal models (Su et al., 2016; Yang et al., 2021).