Fig. 1From: Testosterone and androstanediol glucuronide among men in NHANES IIIKernel density estimates for androstanediol glucuronide by quartiles of testosterone (testosterone concentrations in the 1st to 4th quartile were ≤3.91 ng/ml; 3.92–5.11 ng/ml, 5.12–6.55 ng/ml and 6.56–13.82 ng/ml, respectively)Back to article page