1. Division of Nuclear Biochemistry, National Atomic Energy Commission, Buenos Aires, Argentina
2. Division of Radiation Pathology, Department of Radiobiology, National Atomic Energy Commission, Buenos Aires, Argentina
3. Department of Chemistry, National Atomic Energy Commission, Buenos Aires, Argentina
4. Service of Surgery, V. Lopez County Hospital
5. Division of Nuclear Biochemistry, Division of Radiation Pathology, Department of Radiobiology, and Department of Chemistry, National Atomic Energy Commission, Buenos Aires, Argentina; Service of Surgery, V. Lopez County Hospital; and Department of Human Biochemistry, University of Buenos Aires School of Medicine, Buenos Aires, Argentina