3. Statistical analysis Statistical analyzes will be carried out with specially designed computer equipment such as Prism 6 for Mac OSX v.6.0 (GraphPad Software, Inc., San Diego, CA) and Microsoft Office Excel (Microsoft Corporation, Bucharest, Romania). Statistical analysis of data recorded in the database will be to calculate frequencies and percentages for quantitative variables. Also, for the quantitative variables, the results will be expressed as the mean and standard deviation. Statistical comparisons used for test environments will be calculated with the unpaired t-test and for statistical comparisons used percentages using Chi square test. Statistical significance will be defined at p <0.05.