Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) GREGORY GB.,Mediastinal Germ Cell Tumor in a Child With Precocious Puberty and Klinefelter's Syndrome,Ann Thorac Surg,,,1998,66,,547-548,https://cir.nii.ac.jp/crid/1570291226253174656,https://doi.org/10.1016/s0003-4975(98)00504-9