First' the investigators will attempt to find correlation between the spectral analysis results of the visible wavelengths and the blood test. Then the investigators will further compare the subjects blood sampled usind FTIR spectrometer in the mid infrared (device manufactured by Oriel, Model MIR8025). The device is equpped with plug-ATR (Attenuated Total Reflectance) and allows testing of a small sample of fluids. Vials of samples delivered to Rupin on foil-wrapped test using a cooler with ice will be tested in Ruppin on the day of extraction. The samples will be disposed of as biological waste.