F2 and myocarditis: Among 34 myocarditis patients, four patients (11.7%) died, with procalcitonin 18.8 (±27.5) ng/mL, prothrombin time (PT) 28.7 (±12.4) seconds, and activated partial thromboplastin time (APTT) 102.6 (±46.9) seconds being significantly higher.