Cited 2 times since 2013 (0.2 per year) source: EuropePMC Journal of thoracic oncology : official publication of the International Association for the Study of Lung Cancer, Volume 8, Issue 6, 1 1 2013, Pages e54-6 Benefit of a second opinion: intrapulmonary metastases or multiple primary tumors? ter Avest MJ, Schook RM, Postmus PE, Grünberg K, Ylstra B, Paul MA