We read with interest the recent paper by Wheat et al. (1) reporting on the long-term stability of Aspergillus galacto-mannan in bronchoalveolar lavage fluid (BALF) and serum specimens stored at — 20°C. Their findings contrasted with previously published results from Johnson et al. (2), who had observed a significant loss of signal in serum—but not BALF—samples upon long-term storage. We here expand the data on this controversial subject, showing loss of signal in both BALF and serum samples.
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