Authors: W Himmel; E Ittner; M M Kochen; H W Michelmann; B Hinney; M Reuter; M Kallerhoff; R H Ringert Journal: Br J Gen Pract Date: 1997-02 Impact factor: 5.386
Authors: Nanette Santoro; Esther Eisenberg; J C Trussell; LaTasha B Craig; Clarisa Gracia; Hao Huang; Ruben Alvero; Peter Casson; Gregory Christman; Christos Coutifaris; Michael Diamond; Susan Jin; Richard S Legro; Randal D Robinson; William D Schlaff; Heping Zhang Journal: Hum Reprod Date: 2016-07-07 Impact factor: 6.918