Thomas D Matte, Michaeline Bresnahan, Melissa D Begg, Ezra Susser
Matte T D, Bresnahan M, Begg M D, Susser E.
Influence of variation in birth weight within normal range and within sibships on IQ at age 7 years: cohort study
BMJ 2001; 323 :310
doi:10.1136/bmj.323.7308.310