Using a sample of saliva or swabbed buccal mucosa, a given DNA sample will be analyzed for allelic variants of a gene (TAS2R38), which controls the expression of the bitter taste receptor in each subject. This analysis will be exploratory in nature and its value would be to investigate any potential genotype-phenotype discordance in a given participant in response to the bitter (Prednisone) test substance. The DNA samples will only be used to assess genomic interactions in taste response.