Continuous professional development: elevating thoracic oncology education in Europe by Van Geffen, W, Blum, T, Aliberti, S, Blyth, K, Bostantzoglou, C, Farr, A, Grigoriu, B, Hardavella, G, Huber, R, Maskell, N, Massard, G, Rahman, N, Stolz, D, Van Meerbeeck, J