Sarcoidosis: Technique to enable diagnosis

During the editing of this Letter by Andrew R L Medford and colleagues (BMJ 2009;339:b3962, doi:10.1136/bmj.b3962) we managed to transpose the authors’ addresses. Thus, Dr Medford is at North Bristol Lung Centre, Southmead Hospital, Bristol, whereas Sanjay Agrawal and Jonathan Bennett are at the Department of Respiratory Medicine, Glenfield Hospital, Leicester.