1. Department of Internal Medicine, Respiratory Unit, Federal Medical Centre, Owo Ondo State, Nigeria,
2. Department of Family Medicine, Federal Medical Centre, Owo Ondo State, Nigeria,
3. Department of Internal Medicine, Federal Medical Centre Owo, Ondo State, Nigeria,
4. Community Medicine Department, Federal Medical Centre, Owo, Ondo State, Nigeria,
5. Department of Internal Medicine, Obafemi Awolowo University Ile-Ife, Osun State, Nigeria,
6. Community Health Department, Infection Control and Research Centre, Federal Medical Centre, Owo, Ondo State, Nigeria,