Caudwell Xtreme Everest Res Grp (Including: Levett, Denny Z. H., Martin, Daniel S., Wilson, Mark H., Mitchell, Kay, Dhillon, Sundeep, Rigat, Fabio, 1975-, Montgomery, Hugh E., Mythen, Monty and Grocott, Michael P. W.). (2010) Design and conduct of Caudwell Xtreme Everest: an observational cohort study of variation in human adaptation to progressive environmental hypoxia. BMC Medical Research Methodology, Vol.10 . Article no. 98. ISSN 1471-2288