Conflict of interest statement
None.
Acknowledgements
The preparation of this article was supported by grants from the
Health Department of the Junta de Castilla y Leo´n to the project
‘‘Attention to the primary caregiver of dependent relatives: a
community intervention’’; Carlos III Health Institute (RETICS RD06/
0018/0027); and Castilla y Leo´n Regional Health Authority (project
SAN673/SA44/08). Study sponsors had no role in the study design,
in the collection, analysis and interpretation of data, in the writing
of the manuscript, and in the decision to submit the manuscript for
publication.