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Halling A, Forsberg JG.Halling A, et al. Among authors: forsberg jg.Biol Reprod. 1991 Jul;45(1):157-62. doi: 10.1095/biolreprod45.1.157.Biol Reprod. 1991.PMID: 1878430
Halling A, Forsberg JG.Halling A, et al. Among authors: forsberg jg.Biol Reprod. 1990 Sep;43(3):472-7. doi: 10.1095/biolreprod43.3.472.Biol Reprod. 1990.PMID: 2271728
Halling A, Forsberg JG.Halling A, et al. Among authors: forsberg jg.Teratology. 1992 Jan;45(1):75-82. doi: 10.1002/tera.1420450107.Teratology. 1992.PMID: 1731398