ACE2 and adrenal gland neoplasm: The only differences between this and our study included ACE2 positivity in adrenal gland and corpus luteum, which was not seen (adrenal gland) or not analysed (corpus luteum) by Hikmet et al. Adrenal gland staining was considered a potential cross-reactivity, because RNA expression has not been described for this organ [4,5], and analyses of adrenal gland tumours were therefore not performed in this study.