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Article : Périodique
J. R. EHLERINGER ; J. F. CASALE ; J. E. BARNETTE ; X. XU ; M. J. LOTT ; J. HURLEY |Measurements were made on the natural abundance 14C content (14C) of cocaine specimens seized between 2003 and 2009. The objective of this study was to determine the extent to which 14C analyses could quantify the "age" of recent cocaine seizure[...]
Article : Périodique
I. V. ROLLE ; S. M. KENNEDY ; I. AGAKU ; S. E. JONES ; R. BUNNELL ; R. CARABALLO ; X. XU ; G. SCHAUER ; T. McAFEE |What is already known on this topic? Since 2010, the proportion of U.S. 12th grade students who reported using marijuana during the preceding 30 days (21.4%) has surpassed the proportion reporting use of cigarettes during the preceding 30 days [...]
Article : Périodique
M. D. LIVINGSTON ; X. XU ; K. A. KOMRO |OBJECTIVE: The present study examined factors associated with recall error in the measurement of alcohol use onset and whether there was a tendency toward earlier or later self-reported age at alcohol use onset. METHOD: This study estimated the[...]
