etal testosterone effects on running speed and vascular health. Am. J. Hum. Biol. 19:416-421. Trivets. R.. J. T. Manning. R. Thornhill et at. 1999. Jamaican Symmetry Project: Long-term study of fluctuating asymmetry in rural Jamaican children. Hum. Bid. 71:417-430. EFTA00707036 EFTA00707037