Korelasi feritin serum, saturasi transferin dan waktu relaksasi MRI T2 hipofisis dengan Kadar FSH, LH, dan testosteron pada pasien pria talasemia bergantung transfusi = Correlation of ferritin serum, transferrin saturation and pituitary MRI T2 relaxation time with FSH, LH, and testosterone level in male transfusion-dependent thalassemia