TY - JOUR T1 - Methods in research: key principles of graph construction JF - Evidence Based Medicine JO - Evid Based Med SP - 38 LP - 38 DO - 10.1136/ebm.12.2.38 VL - 12 IS - 2 AU - Rafael Perera Y1 - 2007/04/01 UR - http://ebm.bmj.com/content/12/2/38.abstract N2 - The aim of this series of articles is to highlight papers that may help in the construction and understanding of journal articles. Results in a graphical form are one of the best ways to convey information in a research paper. However, key elements for the construction of graphs are generally not well understood, … ER -