Sampling methods: selecting your subjects.
Air Med J
; 26(2): 75-8, 2007.
Article
in En
| MEDLINE
| ID: mdl-17346642
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Research Design
/
Patient Selection
Type of study:
Clinical_trials
Limits:
Humans
Country/Region as subject:
America do norte
Language:
En
Journal:
Air Med J
Journal subject:
MEDICINA AEROESPACIAL
/
MEDICINA DE EMERGENCIA
Year:
2007
Document type:
Article
Affiliation country:
United States