RT Journal Article SR Electronic T1 Qualitative methods for assessing health care. JF Quality in Health Care JO Qual Health Care FD BMJ Publishing Group Ltd SP 107 OP 113 DO 10.1136/qshc.3.2.107 VO 3 IS 2 A1 R Fitzpatrick A1 M Boulton YR 1994 UL http://qualitysafety.bmj.com/content/3/2/107.abstract AB