Herrera, J. A., Ersheng, G., Shahabuddin, A., Lixia, D., Wei, Y., Faisal, M., Barua, P. C. and Akhtner, H. (2006) “Periodical assessment of the prenatal biopsychosocial risk to predict obstetric and perinatal complications in Asian countries 2002-2003”., Colombia Medica, 37(2 Supl 1), pp. 6–14. doi: 10.25100/cm.v37i2 Supl 1.431.