PTPN11 and psoriasis: Although Lyz2‐cre is also expressed in neutrophils, given the high knockdown efficiency of Shp2 in macrophages and our group demonstration that SHP2 deletion in neutrophils alleviates psoriasis‐like skin inflammation in mice (preprint: Ding et al, 2021), our work focuses on the role of SHP2 in macrophages.