1. Institute of Cellular Biology and Pathology “Nicolae Simionescu”, 8, B.P. Hasdeu Street, P.O. Box 35-14, 050568 Bucharest, Romania
2. National Institute of Endocrinology “C.I. Parhon”, 34-36 Aviatorilor Boulevard, 011863 Bucharest, Romania
3. University of Bucharest, Faculty of Physics, 405 Atomiştilor Street, 077125 Magurele, Romania