Response to Letter Regarding Article, 'Relation of Nailfold Capillaries and Autoantibodies to Mortality in Patients With Raynaud Phenomenon'

We thank Dr Boulon and Dr Constans for their interest in our study reporting the relation of abnormal nailfold capillaries and autoantibodies to mortality in patients with Raynaud phenomenon.1 As correctly highlighted by Dr Boulon and Dr Constans, a complete microscopic scan of each nailfold is essential to not missing single nailfold capillary aberrations. In our study, the entire nailfold capillary fields of fingers 2 to 5 of both hands were completely scanned. In contrast to Dr Boulon and Dr Constans, however, we used a ×250 to ×300 magnification, which complies with previously published studies on nailfold capillaroscopy (×200 to ×600 magnification).2,3 The advantage of a greater magnification during nailfold …