Fig. 1.

Thermographic images of palmar aspect of hands (A) and dorsal aspect of feet (B). The region of interest of the distal finger/toe, palm of the hands and dorsum of the feet are drawn in circles. The color chart provides a temperature scale. First, the coolest finger was chosen among the second, third and fourth fingers and then temperature difference was determined by subtracting the temperature at the coolest finger from the temperature at the palm. Temperature difference of first toe was determined in the same manner as in the hand.