A listing of journal title changes are provided below for all changes occuring in the past two years (the JCR Edition year and one preceding year). The listing is in alphabetical order by journal title. The following information is provided for each journal.

• New title(s)

• Superseded title(s)

• Type of change (change, split, merge)

• Year change occurred

Journal titles may change frequently. Some journals cease but are replaced by others, some may grow and split into sections, and others may narrow their interest and merge with other journals under old or new titles. These changes can be problematic as we seek to describe journal relationships over periods of time. Impact factors, for example, are affected when journal titles change, as discussed in detail in Using the JCR Wisely. In the event of a title change, we refrain from combining data on the basis of lineage, except where a title change has been so minor that it does not affect the title's position alphabetically.