Variable | Year | Supplement |
---|---|---|
AHCBIO | 1999 | Sample adult questionnaire |
BIO_USEM | 2012 | Alternative health |
BIO_USEM | 2007 | Alternative health |
BIO_USEM | 2002 | Alternative health |
CBI_USEM | 2012 | Child complementary and alternative medicine |
CBI_USEM | 2007 | Child complementary and alternative medicine |