Salivary levels of phosphorus and urea as indices of their plasma levels in nephropathic patients.
Giancarlo BilancioPierpaolo CavalloCinzia LombardiErmanno GuarinoVincenzo CozzaFrancesco GiordanoGiuseppe PalladinoMassimo CirilloPublished in: Journal of clinical laboratory analysis (2018)
S-Pho and S-Urea reflect plasma phosphorus and plasma urea. Early morning fasting fresh samples are advisable because collection time and freezing-thawing affect saliva tests.