fig2

Figure 2. Traditional sweat-based platform. (A) Pocket-shape drape in sauna. Reproduced under the terms and conditions of the CC BY^[45]. Copyright 2018, Author(s), published by PLOS; (B) Sweat extraction patched for Na⁺ and K⁺ analysis. Reproduced under the terms and conditions of the CC BY^[46]. Copyright 2014, Author(s), published by Wiley-VCH; (C) Traditional sweat-based electronics in sweat sampling, sensing and data display method (i) and overall device view after the assembly (ii). Reproduced under the terms and conditions of the CC BY^[48]. Copyright 2018, Author(s), published by MDPI.