1. Academic Center of Vitória, Federal University of Pernambuco, Recife, Pernambuco, Brazil
2. Department of Nuclear Energy, Federal University of Pernambuco, Recife, Pernambuco, Brazil
3. Department of Biophysics and Radiobiology, Federal University of Pernambuco, Recife, Pernambuco, Brazil
4. Royal Institute of Radiotherapy, Royal Portuguese Hospital, Recife, Pernambuco, Brazil