TY  - JOUR
A1  - Bergstrand, Robert
A1  - Vedin, Anders
A1  - Wilhelmsson, Claes
A1  - Wilhelmsen, Lars
T1  - Bias due to non-participation and heterogenous sub-groups in population surveys
Y1  - 1983
DO  - 10.1016/0021-9681(83)90166-2
JF  - Journal of Chronic Diseases
VL  - 36
IS  - 10
SP  - 725
EP  - -728

ER  -