*4.1. Materials*

Testosterone, ethoxyresorufin, methoxyresorufin, pentoxyresorufin, resorufin, *p*-nitrophenol, 4-nitrocatechol, NADPH, glutathione, 1-chloro-2,4-dinitrobenzene, lauric acid, 12-hydroxy lauric acid, diclofenac (sodium salt), chlorzoxazone, dextromethophen, 1,1,3,3-tetraethoxypropan, thiobarbituric acid, and heparin were obtained from Sigma (St. Louis, MO, USA). 6-β-Hydroxytestosterone was purchased from Ultrafine Chemicals (Manchester, UK). All other chemicals and reagents were of analytical grade and were obtained commercially.
