Rajaie Cardiomyopathy and Myocarditis Registry: protocol for an observational study oleh Majid Maleki, Freidoun Noohi, Parham Sadeghipour, Mohammad Mehdi Peighambari, Ahmad Amin, Niloufar Samiee, Majid Haghjoo, Nahid Rezaeian, Saeedeh Mazloomzadeh, Elaheh Baghizadeh, Farnaz Rafiee, Behshid Ghadrdoost