- Congenital malformation and maternal occupational exposure to glycol ethers. Occupational Exposure and Congenital Malformations Working Group. Cordier, S., Bergeret, A., Goujard, J., Ha, M.C., Aymé, S., Bianchi, F., Calzolari, E., De Walle, H.E., Knill-Jones, R., Candela, S., Dale, I., Dananché, B., de Vigan, C., Fevotte, J., Kiel, G., Mandereau, L. Epidemiology (Cambridge, Mass.) (1997)