No abstract available
Publication types
-
Letter
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Age Distribution
-
Aged
-
Bias
-
Health Status*
-
Humans
-
Italy / epidemiology
-
Longitudinal Studies
-
Middle Aged
-
Morbidity*
-
Social Class*
-
Surveys and Questionnaires / standards*