HAVCR1 and acute kidney injury: Though many reports demonstrated that urinary Kim‐1 outperformed other AKI markers in preclinical biomarker qualification studies,[7a,b] the variation of urinary Kim‐1 did not synchronize with histopathologic damages since the time from the expression of Kim‐1 to the exfoliation of ectodomain and further transportation toward bladder is non‐negligible.[26] Thus, direct detection of Kim‐1 on renal tubular theoretically permits diagnosis of the onset of AKI earlier than Kim‐1‐based urinalysis.