Secondary objectives will include the impact of oral chronic GVHD on the quality of life, characterization of the changes in tissue and salivary biomarkers associated with development of oral graft versus host disease, and measures of the effects of topical dexamethasone on hypothalamo-pituitary-adrenal axis. Secondary outcomes will include oral cavity specific quality of life as measured by OHIP-14 questionnaire, oral discomfort levels, improvement in general quality of life scores, and severity of oral chronic GVHD as measured by the site-specific GVHD scoring system.