Contributing Editor Dr. Hudson is a Fellow of the Royal Geographical Society and on the expeditionary advisory board for Summit. Sean has been involved in a wide array of expeditions over the last 20 years. During this time he has trekked across the Darien Gap, The Thar Desert, worked as a trekking guide and Chief Medic for Raleigh International in Namibia and Zimbabwe, a trauma medic in Columbia, ski field doctor in New Zealand, spent a season in Anarctica and acted as an advisor to the Foreign Office following natural disasters. Since 1998 he has worked for Across the Divide Expeditions as medic and expedition medicine adviser, providing medical cover on expeditions in 21 different countries. Dogsledding to Desert trekking in Namibia. In 2002, he and his wife, expedition medic Dr. Caroline Knox, established Expedition Medicine, which seeks to provide comprehensive training for medical professionals working as expedition medical officers in a variety extreme and remote environments. Sean is a Contributing Editor for the Expedition Medicine Series and and joins us from the UK.