1. Department of Medical Physics, School of Medical Sciences Tarbiat Modares University, Tehran, Iran.
2. Department of Nuclear Medicine and Endocrinology, PET/CT center, St. Vincentos Hospital, Linz, Austria.
3. Department of Nuclear Medicine, Rajaei Cardiovascular, Medical and Research Center, Tehran, Iran.
4. Department of Medical Physics, Iran University, Tehran, Iran.
5. Department of Nuclear Medicine and Endocrinology, Medical University of Salzburg, Salzburg, Austria.