[1] Univ Nacl Cuyo, Inst Histol & Embriol, CONICET, Mendoza, Argentina
[2] Univ Nacl Cuyo, Fac Ciencias Exactas & Nat, Mendoza, Argentina
[3] Univ Fed Fluminense, Fac Vet, Rio De Janeiro, Brazil
[4] Univ Massachusetts, Dept Vet & Anim Sci, Amherst, MA USA