48 individuals of both sexes and aged between 10 and 85 years were chosen. These individuals were divided according to age, into four groups (each group containing 12 individuals, 6 men and 6 women): Group I (G1): 10 - 18, Group II (G2): 20 - 35; Group III (G3): 45 - 60, Group IV (G4): 65 - 85.