共 4 条
[1]
Presence of bacteriuria caused by trimethoprim resistant bacteria in patients prescribed antibiotics: multilevel model with practice and individual patient data
[J].
BRITISH MEDICAL JOURNAL,
2004, 328 (7451)
:1297-1300
[2]
STATISTICAL QUESTION Spearman's rank correlation coefficient
[J].
BMJ-BRITISH MEDICAL JOURNAL,
2014, 349
[3]
STATISTICAL QUESTION Unit of observation versus unit of analysis
[J].
BMJ-BRITISH MEDICAL JOURNAL,
2014, 348