Fig. 1
From: Effects of cleaning spray use on eyes, airways, and ergonomic load
Flow chart of the study design for one exposure scenario. The different biological sampling and medical assessments included blood samples (blood), nasal lavage (NL) fluids, spirometry (spir.), physician-conducted examination (exam), peak nasal inspiratory flow (PNIF) measurements, measurements of the break-up time (BUT) of the tear film, and self-assessment symptom scores (symptom score)