There is a significant association between HLA-DQA1*0501 and Graves' disease which may be unrelated to the inheritance of this allele on an extended haplotype with HLA-DR3. In contrast to a recent report, HLA-DQA1*0501 was significantly more prevalent among women with Graves' disease than men.

We study the thermodynamics of de Sitter black holes with a conformally coupled scalar field. The geometry is that of the "lukewarm" Reissner-Nordström-de Sitter black holes, with the event and cosmological horizons at the same temperature. This means that the region between the event and cosmological horizons can form a regular Euclidean instanton. The entropy is modified by the non-minimal coupling of the scalar field to the geometry, but can still be derived from the Euclidean action, provided suitable modifications are made to deal with the electrically charged case. We use the first law as derived from the isolated horizons formalism to compute the local horizon energies for the event and cosmological horizons.