Urinary human chorionic gonadotropin among intrauterine device users: detection with a highly specific and sensitive assay**Research at Columbia University was supported directly by the National Institute of Environmental Health Sciences contract N01 ES 4-4054, and supported in part by the National Institute of Health grants HD 15454 and RR 00645.
1987 ◽
Vol 47
(2)
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pp. 265-269
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2007 ◽
Vol 115
(4)
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pp. 564-571
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1998 ◽
Vol 106
(suppl 3)
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pp. 849-855
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1998 ◽
Vol 31
(2)
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pp. 192-194
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