The reference to the term acute coronary syndrome with normal or near-normal (non-obstructive) coronary arteries (ACSNNOCA) from Manolis et al. (2018) was inadvertently omitted to the original published article. Therefore, the following reference should be added to our paper:Manolis AS, Manolis AA, Manolis TA, Melita H. Acute coronary syndromes in patients with angiographically normal or near normal (non-obstructive) coronary arteries. Trends Cardiovasc Med. 2018;28(8):541–51. https://doi.org/10.1016/j.tcm. 2018.05.006. The authors would like to apologise for any inconvenience caused.