1. Division of PulmonologyStellenbosch University Cape Town South Africa
2. Pulmonology DepartmentErasmus Medical Centre Rotterdam the Netherlands
3. Division of Anatomical Pathology, National Health Laboratory ServiceStellenbosch University Cape Town South Africa
4. Division of Cardiothoracic SurgeryStellenbosch University Cape Town South Africa
5. Division of Radiation OncologyStellenbosch University Cape Town South Africa