Serrano, M.A., Salvador, A., Gonzalez-Bono, E., Sanchis, C., Suay, F., 2000. Hormonal responses to competition. Psicothema 12, 440— 444. Suay, F., Salvador, A., Gonzalez-Bono, E., Sanchos, C., Martí, M., Martí-Sanchis, S., Simon, V.M., Montoro, J.B., 1999. Effects of competition and its outcome on serum testosterone, cortisol and prolactin. Psychoneuroendocrinology 24, 551—566. Sutton, J.R., Coleman, M.J., Casey, J., Lazarus, L., 1973. Androgen responses during physical exercise. British Medical Journal 1, 520—522. Tamashiro, K.L.K., Nguyen, M.M.N., Sakai, R.R., 2005. Social stress: from rodents to primates. Frontiers in Neuroendocrinology 26, 27—40.