A randomized trial of open lung biopsy versus empiric antimicrobial therapy in cancer patients with diffuse pulmonary infiltrates. J Clin Oncol Browlne MF, Potter D, Gress J, Cotton D, Hiemenz J, Thaler M, Hathorn J, Brower S, Gill V, Glatstein E, Pass H, Roth J, Wesley R, Shelhamer J, Pizzo PA 1990; 8: 222-9