Data management {19}
All data collected will be entered into the online database in Excel files and SPSS files. All data will be kept in password-protected computers and destroyed 5 years after publication in PhD thesis and peer-reviewed journals. The PhD candidate will be responsible for data collection, data entry, and data analysis. She will enter the data into the database for screening and randomisation purposes. After data collection, she will enter all data into Excel files and then input them into SPSS files for data analysis. Double data entry and range checks for data values will be used to promote data quality.