psoriasis and others (Figure 1). Cellular and molecular mechanisms underlying the observed alleviation from pain in radon spa are widely unknown. © Gasteinertal Tourismus GmbH Figure 1: Patients in a radon gallery [...] Res. B, 416 :119-127 (2018) [14] Rühle et al., Modern Rheumatology, 29 (1):165-172, (2019) [15] Maier et al., Int. J. Mol. Sci. 22 (1), 316 (2021) [16] Ebner et al. 2017, Front Immunol., 8:99 (2017) [17] [...] concentration, which can be adjusted comparable to radon therapy or higher (Figure 4, click to enlarge) [1]. Diffusion and solubility measurements of radon and an analysis algorithm were developed [2]. Furthermore