aThiotaine (INCI: L-Ergothioneine) is a product of Barnet Products Corp., Englewood Cliffs, N.J., USA.
b The Multi Probe Adapter (MPA) 5 device;
c Corneometer CM 825 probe;
d Visioscan camera; and e SELS 2000 software all are manufactured by Courage-Khazaka Electronic GmbH, Köln, Germany.
f Aplio XG is a device manufactured by Toshiba, Tokyo.
g The experimental device, named µScan, was created by a research team led by A. Nowicki, PhD, at the Polish Academy of Science.