Risk-adapted stereotactic ablative radiotherapy for central and ultra-central lung tumours. - Lenglet, Alexis; Campeau, Marie-Pierre; Mathieu, Dominique; Bahig, Houda; Lambert, Louise; Vu, Toni; Roberge, David; Bilodeau, Laurent; Filion, Edith (Radiotherapy & Oncology, 2019)