Erratum to: Health Serv Outcomes Res Method (2012) 12:84–103 DOI 10.1007/s10742-012-0089-7

The revised version of “Acknowledgment” section is presented in this erratum.

Acknowledgments

The development of this article was supported by the Center for Substance Abuse Treatment (CSAT), Substance Abuse and Mental Health Services Administration (SAMHSA) contract #270-07-0191 using data provided by the following grantees: Cannabis Youth Treatment (Study: CYT; CSAT/SAMHSA contracts #270-97-7011, #270-00-6500, #270-2003-00006 using data provided by the following grantees: TI-11317, TI-11321, TI-11323,TI-11324) and Effective Adolescent Treatment (Study: EAT; CSAT/SAMHSA contracts #277-00-6500, #270-2003-00006 using data provided by the following grantees: TI11317, TI11321, TI11323, TI3234, TI-15413, TI-15433, TI-15447, TI-15461, TI-15467, TI-15475, TI-15478, TI-15479, TI-15481, TI-15483, TI-15486, TI-15511, TI-15514, TI-15545, TI-15562, TI-15670, TI-15671, TI-15672, TI-15674, TI-15678, TI-15682, TI-15686, TI-15415, TI-15421, TI-15438, TI-15446, TI-15458, TI-15466, TI-15469, TI-15485, TI-15489, TI-15524, TI-15527, TI-15577, TI-15584, TI-15586, TI-15677). The authors thank these grantees and their participants for agreeing to share their data to support this secondary analysis. The opinions about this data are those of the authors and do not reflect official positions of the government or individual grantees.