Proposed reference method for reticulocyte counting based on the determination of the reticulocyte to red cell ratio

R. M. Rowan, J. M. England, O. W. Van Assendelft, B. S. Bull, W. H. Coulter, K. Fujimoto, W. Groner, I. Van Hove, A. R. Jones, R. J. Kanter, G. G. Klee, J. A. Koepke, S. M. Lewis, G. D'Onofrio, N. Tatsumi, C. E. McLaren