Wu, M., Nienhuis, R., Maidment, N., Lam, H., & Siegel, J. (2011). Cerebrospinal fluid hypocretin (orexin) levels are elevated by play but are not raised by exercise and its associated heart rate, blood pressure, respiration or body temperature changes.

Wu, M.-F., R. Nienhuis, N. Maidment, H.A Lam, and J.M Siegel. Cerebrospinal Fluid Hypocretin (orexin) Levels Are Elevated By Play but Are Not Raised By Exercise and Its Associated Heart Rate, Blood Pressure, Respiration or Body Temperature Changes. 2011.

Wu, M.-F., et al. Cerebrospinal Fluid Hypocretin (orexin) Levels Are Elevated By Play but Are Not Raised By Exercise and Its Associated Heart Rate, Blood Pressure, Respiration or Body Temperature Changes. 2011.