00430nam a22001577i 450000500170000000800410001704100080005810000160006624500450008265000250012765000320015265100160018465000160020065500150021677300410023120141212085911.0871230s1987    sp     gr     000 0 spa c  aeng1 aOWENS, J.R.10aRECURRENCE RATES FOR NEURAL TUBE DEFECTS14aEstudio longitudinal14aMalformaciones congénitas14aReino Unido14aTubo neural 4aDocumental0 tTHE LANCETgno. 8440 (1985), p. 1282