Volume 21 No. 1 (2004), in the article “Notes on a discrepancy in mitochondrial DNA and allozyme differentiation in a pond frog Rana nigromaculata” by Jong-Bum Kim, Masafumi Matsui, Jung-Eun Lee, MiSook Min, Jae-Hwa Suh and Suh-Yung Yang,  page 39–42.

In contents of Vol. 21, No. 1, this article was classified into Behavior Biology by mistake. It should be classified into Animal Diversity and Evolution.