Defining Patient Complexity.

Several letters to the editor are presented including two in response to the article "Defining patient complexity from the primary care physician's perspective: a cohort study" by R. W. Grant, J. M. Ashburner, C. C. Hong, Y. Chang, M. J. Barry and S. J. Atlas in a previous issue, and one which is a response from above authors to the letters to the editor about their article.