Olfactory stimuli
The olfactory stimuli consisted of androstadienone (500 μM in 1% v/v clove oil propylene glycol solution) and the carrier solution alone (control, 1% v/v clove oil in propylene glycol). The concentration of androstadienone used in the current study (500 μM) was comparable to that in freshly produced apocrine sweat (mean = 0.44 nmol/μl = 0.44 × 10