Time and cost inputs of the informant method and retrospective surveys with 6 month and 30 day recall periods, by site and staff type.

See text and Tables 1 and 2 for assumptions for time and cost inputs respectively for retrospective surveys.
§Respondents for data collection and population estimation.
*Investigator time inputs are for implementing the informant method, rather than evaluating its validity and feasibility.
**Costs not attached as they are not normally paid to respondents, participants and key-informants.