In normal subjects the concentration ratio of secretory IgA (sIgA) to total IgA in nasal secretion was measured by means of enzyme-linked immunosorbent assays (ELISA). No marked circadian variation was disclosed in the sIgA/IgA ratio in nasal secretion.
No takes yet. Share an insight, caveat, or question.
Harada et al. (1984) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: