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OpenAthens Shibboleth
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Special Feature
January 1998

Picture of the Month

Author Affiliations


Arch Pediatr Adolesc Med. 1998;152(1):89-90. doi:10.1001/archpedi.152.1.89

THREE SIBLINGS are depicted in Figure 1. The girl, aged 9 years, is flanked by her 8-year-old fraternal twin brothers. The twin on the left of the photograph is mentally retarded and the twin on the right is not.