Editorial Expression of Concern: Changes of the Level of G Protein α-Subunit mRNA by Tolerance to and Withdrawal from Butorphanol (Neurochemical Research, (2003), 28, 12, (1771-1778), 10.1023/A:102619882042)

The Editor-in-Chief would like to alert the readers that concerns have been raised regarding the images presented in Fig. 1 of this article [1]. Specifically, the Tolerance and Withdrawal images in Fig. 1 appear highly similar to the Rc and Rg1 images, respectively, in Fig. 1 of [2]. The authors have stated that the images used in this article represent the trends observed in the study, but they have been unable to verify whether they originate from the groups indicated in the figure. Readers are therefore advised to interpret these results with caution. Seikwan Oh agrees to this Editorial Expression of Concern. The Publisher has not been able to obtain current email addresses for Dong Sup Kim, Hwa Kyung Lim and Soyong Jang.