1. S.C. Ecodet Activ S.R.L, Fizicienilor No.22, BL.21A, Sc.1, Ap.22, Bucharest, 3, Romania,
2. National Environmental Protection Agency, Splaiul Independentei No. 294, Bucharest, 6, Romania,
3. Carol Davila University of Medicine and Pharmacy, Dionisie Lupu No. 37, Bucharest, 1, Romania,
4. Clinical Hospital Grigore Alexandrescu, Iancu De Hunedoara No. 30-32, Bucharest, 1, Romania,
5. University “Titu Maiorescu”, Gheorghe Petrascu No. 67A, Bucharest, 3, Romania, and
6. Clinical Hospital Colentina, Stefan Cel Mare No. 19–21, Bucharest, 2, Romania