Table 1 Iterative development process for complementary medicine questionnaires
Questionnaire development steps | Year | ||
|---|---|---|---|
| Â | 2002 | 2007 | 2012 |
 Literature review | X | X | X |
 Feedback from scientific communities on previous questionnaires |  | X | X |
 Expert input/panel | X |  | X |
 Conceptual workshop |  |  | X |
 Inductive cognitive review |  |  | X |
 Cognitive interviews with staff members |  |  | X |
 Cognitive interviews with volunteers from general public | X | X | X |
 Focus groups with health leaders and subject matter experts |  |  | X |
 Feedback from Census Bureau interviewers | X | X | X |
 Quantitative analysis of previous child survey data |  |  | X |