Maintenance: From Wednesday, May 30, 2018 6:00 p.m. to Thursday, May 31, 2018 morning, maintenance work on the ZORA servers is scheduled. ZORA will not be available during this period. Thank you for your patience.
Whitingt, P F; Sterne, J A C; Westwood, M E; Bachmann, L M; Harbord, R; Egger, M; Deeks, J J (2008). Graphical presentation of diagnostic information. BMC Medical Research Methodology, 8:20.