Establishing data elements for the Paul Coverdell National Acute Stroke Registry: Part 1: proceedings of an expert panel. - Wattigney WA; Croft JB; Mensah GA; Alberts MJ; Shephard TJ; Gorelick PB; Nilasena DS; Hess DC; Walker MD; Hanley DF Jr; Shwayder P; Girgus M; et al. (Stroke, 2003)