Endoscopic Ultrasonography with Fine-Needle Aspiration: An Accurate and Simple Diagnostic Modality for Sarcoidosis - Mishra, G.; Sahai, A.V.; Penman, I. D.; Williams, D. B.; Judson, M. A.; Lewin, D. N.; Hawes, R. H.; Hoffman, B. J. (Endoscopy, 1999)