Comparison between nafarelin acetate and D-Trp6-LHRH for temporary pituitary suppression in in vitro fertilization (IVF) patients: a prospective crossover study - Tanos,V.; Friedler,S.; Shushan,A.; Strauss,N.; Hetsroni,I.; Lewin,A. (J Assist Reprod Genet, 1995)