The study of Kafka, which included 140 patients with coronary artery disease, showed that serum NGAL concentrations increased with the severity of coronary artery disease—stable angina, unstable angina, non-ST-segment elevation myocardial infarction (NSTEMI), and ST-segment elevation myocardial infarction (STEMI)—with the highest value in STEMI patients [165]. Here, LCN2 is linked to angina pectoris.