2.1. Subject Enrolment, Allocation and Inclusion Criteria
RECRUITMENT
This was a randomized, double-blinded, crossover trial. Subjects aged 18–65 years were recruited using flyers, advertisements in local and campus newspapers and email. The recruitment started in March 2021 and the data collection was completed in October 2022. Sixty-one people indicated an interest in the study and contacted the study staff through email or phone (