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How important are comprehensive literature searches and the assessment of trial quality in systematic reviews? Empirical study.
Authors: Egger M, Jüni P, Bartlett C, Holenstein F, Sterne J Source: Health Technol Assess. 2003;7(1):1-76. DOI: 10.3310/hta7010 Language: English Availability: none
An empirical study of the possible relation of treatment differences to quality scores in controlled randomized clinical trials
Authors: Emerson JD, Burdick E, Hoaglin DC, Mosteller F, Chalmers TC Source: Control Clin Trials. 1990 Oct;11(5):339-52 DOI: 10.1016/0197-2456(90)90175-2 Language: English Availability: abstract