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3. Naloxone potentiates cardiopulmonary baroreflex sympathetic control in normal humans;Schobel, H.P.; Oren, R.N.; Mark, A.L.; Ferguson, D.W.;Circ Res,1992
4. Increase in plasma beta endorphins in vasodepressor syncope;Perna, G.P.; Ficola, U.; Salvatori, M.P.; Stanisloa, M.; Vigna, C.; Villella, A.;Am J Cardiol,1990
5. Methodology of head-up tilt testing in patients with unexplained syncope;Fitzpatrick, A.P.; Theodorakis, G.; Vardas, P.; Sutton, R.;7 Am Coil Cardiol,1991