RT Journal Article
SR Electronic
T1 Statistical and design issues in studies of groups
JF Injury Prevention
JO Inj Prev
FD BMJ Publishing Group Ltd
SP 6
OP 7
DO 10.1136/ip.8.1.6
VO 8
IS 1
A1 P Cummings
A1 T D Koepsell
YR 2002
UL http://injuryprevention.bmj.com/content/8/1/6.abstract
AB