SUBJECTS Ten healthy, non-smoking, overweight or obese subjects (6 females and 4 males) voluntarily participated in this study. The mean ± SD age of the subjects was 32.4 ± 10.9 yr (range: 18.7 - 55.6 yr), and their mean ± body mass index value was 27.4 ± 2.6 kg/m2 (range: 25.3 - 32.3 kg/m2).