TY - JOUR T1 - Overview of research designs JF - Emergency Medicine Journal JO - Emerg Med J SP - 546 LP - 549 DO - 10.1136/emj.19.6.546 VL - 19 IS - 6 AU - M J Clancy Y1 - 2002/11/01 UR - http://emj.bmj.com/content/19/6/546.abstract N2 - The fourth paper in the research series looks at the difficulties in establishing truth for the researcher and provides an overview of research design. ER -