LAP3 and obstructive sleep apnea syndrome: For the differentially expressed proteins between mild OSA and non-OSA groups, proteins were mainly enriched in “myeloid leukocyte activation,” “leukocyte activation involved in the immune response,” “regulation of body fluid levels,” etc. under the category of biological process; were enriched in “secretory granule,” “vesicle,” “extracellular membrane-bounded organelle,” “intracellular vesicle,” etc. under the category of cellular component; and were enriched in “monosaccharide binding,” “cation binding,” “peptidase regulator activity,” etc. under the category of molecular function.