Effect of sildenafil and acclimatization on cerebral oxygenation at altitude. by Chan, C, Hoar, H, Pattinson, K, Bradwell, A, Wright, A, Imray, C

Intrapulmonary and intracardiac shunting with exercise at altitude. by Imray, C, Pattinson, K, Myers, S, Chan, C, Hoar, H, Brearey, S, Collins, P, Wright, A