Note that the result I get from running your code as supplied (except that I changed the read loop to read from __DATA__) is:

Am. J. Med. Genet.[JO] AND 1983[DP] AND 15[VI] AND 39[PG]
Teebi, A. S.; Rucquoi, J. K.; Meyn, M. S.: Aarskog syndrome: report of
+ a family with review and discussion of nosology. Am. J. Med. Genet.[
+JO] AND 1993[DP] AND 46[VI] AND 501[PG]
Am. J. Med. Genet.[JO] AND 1993[DP] AND 46[VI] AND 501[PG]
[download]

which is slightly different to the sample you provided. I suspect that that is not important, but you should confirm that that is the case.