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Peña FJ, Johannisson A, Wallgren M, Rodriguez-Martinez H.Peña FJ, et al. Among authors: wallgren m.Theriogenology. 2004 Jan 1;61(1):63-70. doi: 10.1016/s0093-691x(03)00181-x.Theriogenology. 2004.PMID: 14643862