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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: J Allergy Clin Immunol. 2017 May 4;141(4):1191–1201. doi: 10.1016/j.jaci.2017.04.021

Figure 2.

Figure 2

Schematic depiction of the position of the biospecimen with regard to the invasiveness of collection (x-axis), relevance to airway environmental exposure (y-axis), and comprehensiveness of metabolites composition (represented by color gradient) and abundance of the biospecimen for collection (represented by size of the bubbles). The quantification of the biospecimen properties is subjective judgment of the authors on the scale of 1 to 10. EB=Exhaled breath, NLF= Nasal lavage fluid, and BALF=Bronchoalveolar lavage fluid.