[…] protease inhibitor and antimicrobial protein, is decreased with advanced age.
[anesthesiology.pubs.asahq.org]
J Respir Crit Care Med 2001; 164:464–8Palmer, L Albulak, K Fields, S Filkin, A Simon, S Smaldone, G Shugars DC, Watkins CA, Cowen HJ: Salivary concentration of secretory leukocyte
[anesthesiology.pubs.asahq.org]