Ellis, Charles N.; Drake, Lynn A.; Prendergast, Mary M.; … - In: PharmacoEconomics 21 (2003) 12, pp. 875-883
Background: The use of expert opinion is widespread in economic studies of healthcare utilisation; however, few studies have attempted to assess the validity of assumptions derived from such sources. Objective: To examine the use of such expert opinion in determining comorbidities associated...