“…Since sex differences in platelet 5-HT values were observed in healthy persons (Oxenkrug, 1979;Muck-Seler et al, 1996;Muck-Seler et al, 1999;Pivac et al, 2004) and psychiatric patients (Muck-Seler et al, 1996;Muck-Seler et al, 1999: Pivac et al, 2001Pivac et al, 2004), only male subjects participated in our study, while both male and female patients were included in the other studies (Takahashi, 1976;Saxena el al., 1999).…”