单位:[1]Osler Chest Unit, Churchill Hospital, Oxford OX3 7LJ, UK[2]Department of Respiratory Medicine, Friendship Hospital, Peking, China[3]Department of Community Medicine and General Practice, University of Oxford[4]10 Beauchamp Avemue, Leamington Spa, Warwickshire[5]84 Church Street, Chesham, Buckinghamshire[6]Oxford Acupumcture Centre, Oxford.