1. Private Dialysis Unit “Nefroiatriki”, Chlois 85 Str., 14452, Metamorfosi, Athens, Greece
2. 417 Veterans Army Administration Hospital of Athens, Monis Petraki 10-12, 11521, Athens, Greece
3. Graduate Program “Metabolic Bones Diseases”, National and Kapodistrian University of Athens, Medical School, Mikras Asias 75, 11527, Goudi, Athens, Greece