TY - RPRT TI - The measurement of active errors: methodological issues. AU - R J Lilford AU - M A Mohammed AU - D Braunholtz AU - T P Hofer PY - 2003 DO - 10.1136/qhc.12.suppl_2.ii8 UR - https://pubmed.ncbi.nlm.nih.gov/14645889/ ID - 14645889 ER -