Please note the typo in Lamers' Eq. (5) where it should be $\cos^{2}(\theta)$ instead of $\cos~(\theta)$ , and that in his paper $\theta$ is measured from the equator.

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There exists one exception in the literature: The (more or less) pole-on LMC star R 66 is assumed to have a radius of 125 $R_{\odot}$ (see Table 1 in Zickgraf 2006), while all other stars fall well below our adopted radius of 82 $~R_{\odot}$ .

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