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  • Article August 01, 1989

    Gilbert A. Martinez; Alan S. Ryan, PhD

    Am J Dis Child. 1989; 143(8):924-928. doi: 10.1001/archpedi.1989.02150200076022

  • Article January 01, 1987

    Henry L. Nadler, MD; Wendy J. Evans, MPH

    Am J Dis Child. 1987; 141(1):21-27. doi: 10.1001/archpedi.1987.04460010021014