1- Sample size does not mention how manypersons will be in the study
2-Was this study already done? The orocedures: Age is different than the inclusion criteria and mostly written in the past tense.
3- Risks are mentioned as no rusk: no research has no risks: what about the time spent in the study, what about at least the discomfort from the smell?
4- The informed consent is already signed and has no name of study ans other specific info are missing.