Secretion of beta-human chorionic gonadotropin by non-small cell lung cancer: a case report Khattri, S.; Vivekanandarajah, A.; Varma, S.; Kong, F. Journal of Medical Case Reports 5: 19 2011 1752-1947 10.1186/1752-1947-5-19 https://eurekamag.com/research/055/683/055683939.php