Can physician's self‐estimates be used as a valid instrument to determine prescription frequencies of anti‐psoriatic drugs? Comparison of the results of a cross‐sectional study using self‐estimates with actual prescription behavior documented in a cohort study

Physicians' self‐estimates of their own prescription behavior can be used as a tool to gather information on prescription frequencies. Self‐estimates as a tool for health‐care research on prescription frequencies need to be validated as a suitable method before it can be used widely.

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