Dr Jim Duff has more than 30 years' experience of climbing, trekking and teaching wilderness medicine, first aid and leadership. He was doctor on Chris Bonington's 1975 expedition, which made the first ascent of Everest's Southwest Face, and on the Australian first ascent of the North Face of Everest in 1984. Jim lives in Australia and teaches and lectures on wilderness medicine internationally.

Dr Ross Anderson is a GP and medical consultant for expedition and adventure travel companies. He holds the UIAA Diploma in Mountain Medicine and is a keen outdoor enthusiast with interests including trekking, ski touring and trail running.