• Seasonal and circadian variation in salivary testosterone in rural Bolivian men 

      Vitzthum, Virginia J; Worthman, Carol M; Beall, Cynthia M; Thornburg, Jonathan; Vargas, Enrique; Villena, Mercedes; Soria Sánchez, Rudy; Cáceres, Esperanza; Spielvogel, Hilde (American Journal of Human Biology, 2009-02-19)
      Abstract. Testosterone (T) plays a key role in the increase and maintenance of muscle mass and bone density in adult men. Life history theory predicts that environmental stress may prompt a reallocation of such investments ...
    • Ventilation and hypoxic ventilatory response of Tibetan and Aymara high altitude natives 

      Beall, Cynthia M; Strohl, Kingman P; Blangero, John; Williams-Blangero, Sarah; Almasy, Laura A; Decker, Michael J; Worthman, Carol M; Goldstein, Melvyn C; Vargas, Enrique (American Journal Physical Anthropology, 1997)
      ABSTRACT. Newcomers acclimatizing to high altitude and adult male Tibetan high altitude natives have increased ventilation relative to sea level natives at sea level. However, Andean and Rocky Mountain high altitude natives ...