Letter by Ye et al Regarding Article, "Early Use of N-Acetylcysteine With Nitrate Therapy in Patients Undergoing Primary Percutaneous Coronary Intervention for ST-Segment-Elevation Myocardial Infarction Reduces Myocardial Infarct Size (the NACIAM Trial [N-Acetylcysteine in Acute Myocardial Infarction])"