The Public Health England Research Ethics and Governance of Public Health Practice Group (PHE REGG) approved this study and all research was performed in accordance with relevant guidelines and regulations of the Ethical Review Board. We recruited 25 healthy volunteers (12 males and 13 females, ranging in age from 22 to 57 years old (mean 38, SD +/-9.8) through contact and collaboration with the entertainment industry. Informed consent was obtained from all participants prior to study participation.