|
jameslindlibrary.org
|
|
Records
Methodological context for: Amberson JB, McMahon BT, Pinner M (1931). A clinical trial of sanocrysin in pulmonary tuberculosis. American Review of Tuberculosis 1931;24:401-35.
- Allocation bias
- Differences between the people compared
- Observer bias
- Differences in the way treatment outcomes are assessed