Consensus statement on the definition of orthostatic hypotension, pure autonomic failure, and multiple system atrophy

I. J. Schatz, R. Bannister, R. L. Freeman, C. G. Goetz, J. Jankovic, H. C. Kaufmann, W. C. Koller, P. A. Low, C. J. Mathias, R. J. Polinsky, N. P. Quinn, D. Robertson, D. H.P. Streeten