RT Journal Article
SR Electronic
T1 Bias: adding to the uncertainty
JF British Journal of Ophthalmology
JO Br J Ophthalmol
FD BMJ Publishing Group Ltd.
SP 637
OP 638
DO 10.1136/bjo.83.6.637
VO 83
IS 6
A1 JOHN M SPARROW
A1 JOHN R THOMPSON
YR 1999
UL http://bjo.bmj.com/content/83/6/637.abstract
AB