The incremental shuttle walk test predicts mortality in non-group 1 pulmonary hypertension: results from the ASPIRE Registry oleh Catherine G. Billings, Robert Lewis, Judith A. Hurdman, Robin Condliffe, Charlie A. Elliot, A.A. Roger Thompson, Ian A. Smith, Matthew Austin, Iain J. Armstrong, Neil Hamilton, Athanasios Charalampopoulos, Ian Sabroe, Andrew J. Swift, Alexander M. Rothman, Jim M. Wild, Allan Lawrie, Judith C. Waterhouse, David G. Kiely