Authors: A Lenzi; L Gandini; F Lombardo; F Dondero; F Culasso; F Ferro; P Cambiaso; P Caione; M Cappa Journal: Fertil Steril Date: 1997-05 Impact factor: 7.329
Authors: M M Lee; P K Donahoe; B L Silverman; T Hasegawa; Y Hasegawa; M L Gustafson; Y C Chang; D T MacLaughlin Journal: N Engl J Med Date: 1997-05-22 Impact factor: 91.245