1. Laboratory of Meteorology, Department of Physics, University of Ioannina, 451 10 Ioannina, Greece,
2. Laboratory of Meteorology, Department of Physics, University of Ioannina, 451 10 Ioannina, Greece
3. National Observatory of Athens, 152 36 Athens, Greece
4. Cardiological Department, KAT Hospital, 151 25 Athens, Greece