Maternal serum alpha-fetoprotein - a marker of fetal aplastic crisis during intrauterine human parvovirus infection. - Carrington,D.; Gilmore,D.H.; Whittle,M.J.; Aitken,D.; Gibson,A.A.; Patrick,W.J.; Brown,T.; Caul,E.O.; Field,A.M.; Clewley,J.P,. (Lancet, 1987)